which graph represents y=-2x
Answers
A graph which represents the linear function y = -2x is: graph B.
What is a graph?In Mathematics, a graph can be defined as a type of chart that is typically used for the graphical representation of data points or ordered pairs on both the horizontal and vertical lines of a cartesian coordinate, which are the x-axis and y-axis respectively.
Generally speaking, the graph of any proportional relationship is characterized by a straight line with the data points passing through the origin (0, 0) because as the values on the x-axis (x-coordinate) either increases or decreases, the values on the y-axis (y-coordinate) increases or decreases simultaneously.
In this context, we can reasonably infer and logically deduce that the relationship between x-values and y-values in the graph of y = -2x is proportional as it passes through the origin (0, 0).
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Related Questions
Graph the inequality on the axes below.
x + 3y ≥ 9
Answers
Use the value of the discriminant to determine whether the quadratic equation has two rational solutions, two irrational solutions, one repeated real solution, or two complex solutions that are not real.
3z² +3z +10=0
Choose the correct answer below.
O A. one repeated real solution
OB. two irrational solutions
OC. two rational solutions
OD. two complex solutions that are not real
Answers
Answer:
D
Step-by-step explanation:
discriminant = 9 - 4(10 * 3)
9 - 4 * 30
9 - 120 = -111
Is negative so the equation has two complex solutions
33 is what percent of 132?
Answers
33/132=.25 then you multiply .25 by 100 which is 25 and you just add the percent sign
- Solution for 33 is what percent of 132:
- Percentage solution with steps:
Step 1: We make the assumption that 132 is 100% since it is our output value.
Step 2: We next represent the value we seek with "x".
Step 3: From step 1, it follows that 100%=132
Step 4: In the same vein, x%=33
Step 5: This gives us a pair of simple equations:
100%=132(1)
x%=33(2)
Step 6: By simply dividing equation 1 by equation 2 and taking note of the fact that both the LHS (left-hand side) of both equations have the same unit (%); we have
100%/x% = 132/33
Step 7: Taking the inverse (or reciprocal) of both sides yields
x%/100%=33/132
x=25%
Therefore, 33 is 25% of 132
Select the transformation
the pre-image FISH onto its image F'I'S'H'.
[₁
S'
H
F₁ H'
FL
rule that correctly maps
S
T
Answers
The vertices have been shifted toward the left by 1 unit and also 3 units up to form the image F'I'S'H'.
What is graph transformation?
The process of altering a graph to produce a different version of the preceding graph is known as graph transformation. The graphs can be moved about the x-y plane or translated. They can also be stretched, or they can undergo a combination of these changes. We discuss the various graph transformations in this post.Graph stretching
A function's graph can be stretched by adding a constant factor to it or to one of its independent variables. The stretch could be horizontal or vertical. Let's talk about stretching horizontally and vertically.Observing each of the vertices of the square, we can say that the vertices have been shifted toward the left by 1 unit and also 3 units up to form the image F'I'S'H'. So, the transformation involved in moving the preimage FISH to form F'I'S'H' the image is translation.
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Aslam invested rs 210000part at 8% per annum and the rest at 6%per annum. if the annual incomes from both investment were the same, find the amount invested at each rate.
Answers
a = amount invested at 8%
how much is 8% of "a"? (8/100) * "a", namely 0.08a.
b = amount invested at 6%
how much is 6% of "b"? (6/100) * "b", namely 0.06b.
we know the total amount invested is 210000, so whatever "a" and "b" might be, we know that a + b = 210000.
we also know that the yielded amount in interest is the same for both, so whatever 0.08a and 0.06b are, we know they're the same.
[tex]\begin{cases} a+b=210000\\\\ 0.08a=0.06b \end{cases}\hspace{5em}a+b=210000\implies b=210000-a \\\\\\ \stackrel{\textit{substituting on the 2nd equation}}{0.08a~~ = ~~0.06(210000-a)}\implies 0.08a=12600-0.06a\implies 0.14a=12600 \\\\\\ a=\cfrac{12600}{0.14}\implies \boxed{a=90000}\hspace{9em}\boxed{\stackrel{210000~~ - ~~90000}{b=120000}}[/tex]
f(n)=-3n+7; find f(-8)
Answers
Answer:
f(-8) = 31
Step-by-step explanation:
f(-8) = -3(-8) + 7
= 24 + 7
= 31
Given ∠RUY=90° and ∠RST=90°
Find YT=
Answers
Answer:
YT= 23
We know that:
line RU is 32 and US is 16
line RY is 46
In other words, RU = 32, US = 16, and RY = 46
so we use the triangle proportionality theorem to state that:
[tex]\frac{RU}{US}=\frac{RY}{YT}[/tex]
Input your values
[tex]\frac{32}{16} =\frac{46}{YT}[/tex]
Use cross products :
[tex]32YT=(16)(46)[/tex]
Simplify:
[tex]32YT=736[/tex]
[tex]\frac{32YT}{32} =\frac{736}{32}[/tex]
[tex]YT=23[/tex]
I hope this answers you question :)
what does the graph do if “a” is a number between zero and one compared to greater than one?
Answers
For any given graph when "a" is a number between zero and one then graph of the function get horizontal stretch.
And when "a" is a number greater than one then graph of a function get horizontal compress.
As given in the question,
For any graph of a function,
When "a" is a number between zero and one than the graph of the function get horizontal stretch.
f(x) = ax²
let a = 1/2 , 0 < 1/2 < 1 so satisfied the condition of "a" between zero and one.
f(x) = x²/2
In this case , graph of the given function get horizontal stretch compare to original graph.
When a = 2 , 2 > 1 satisfied the condition of "a" greater than one.
f(x) = 2x²
In this case , graph of the given function get horizontal compress compare to original graph.
Therefore, for any given graph when "a" is a number between zero and one then graph of the function get horizontal stretch.
And when "a" is a number greater than one then graph of a function get horizontal compress.
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The average daily attendance at the Lincoln School was 348 students during the month of March. If the month had 21 school days, what was the total attendance?
Answers
The total attendance for Lincoln school for month of March is 7308.
What is average attendance?
Divided by the total number of days in the ordinary school year, is the total number of days that students were present. One ADA(Avg. Daily attendance) would be the number of students who attend every day. The number of kids enrolled in each school and district, known as enrollment, is not the same as ADA.
Main Body:
So according to formula ,
Average daily attendance = Total attendance / total days of school
348 = total attendance/ 21
total attendance = 348* 21
= 7308
Hence total attendance is 7308.
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For the data in the table, does y vary directly with x? If
it does, write an equation for the direct variation.
Answers
The variable y vary directly with respect to x , and the equation to denote this direct variation is y = 1.375 x .
From the table we can see that the values of x are 8 for the y value of 11
Any direct variation is represented by the equation :
y = k x , where k is a constant
now we put the values of x and y in the equation to calculate k
11 = k × 8
or, k = 11 / 8 = 1.375
again , at x = 16 , y is 22
∴ k = 22/16 = 1.375
Hence the equation for direct variation will be given by
y = kx
or, y = 1.375 x
When one quantity changes directly in reaction to a change in another quantity, this is a type of proportionality known as "direct variation." This implies that if one quantity rises, the other will rise correspondingly as well.
Like in the previous illustration, if one quantity decreases, the other quantity also decreases. Direct variation will have a linear relationship with the graph, resulting in a straight line.
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simplify 4x5 - 25x³/ 2x-5
Help me and I'll reward you.
Answers
Answer:
i don't understand
Step-by-step explanation:
the question is 11 divided 2and2over 3
[tex]=\frac{x^{3}(4x^{2} -25) }{2x-5} \\=\frac{x^{3} (2x+5)(2x-5)}{2x-5} \\=x^{3} (2x+5)\\=2x^{4}+5x^{3}[/tex]
⇒Note there was a 2x-5 in the numerator and a 2x-5 in the denominator so they canceled each other. Leaving the above expression.
according to 2015 census data, 42.7 percent of colorado residents were born in colorado. if a sample of 250 colorado residents is selected at random, what is the standard deviation of the number of residents in the sample who were born in colorado?
Answers
The standard deviation of the number of residents in the sample who were born in Colorado is 7.82
Standard deviation:
The measure which shows how much variation (such as spread, dispersion, spread,) from the mean exists is know as standard deviation.
Given,
According to 2015 census data, 42.7 percent of Colorado residents were born in Colorado. if a sample of 250 Colorado residents is selected at random.
Here we need to find the standard deviation of the number of residents in the sample who were born in Colorado.
Here we know that following details,
Number of sample = 250
Estimated proportion for residents born in Colorado = 42.7% which is equal to = 0.427.
Let us consider X be the random variable of interest (number of residents in the sample), on this case we now that:
X ~ (n = 250, p = 0.427)
Now, according to the probability mass function for the Binomial distribution is given as:
E(X) = n x p = 250 x 0.427 = 106. 75.
Now, the standard deviation for the random variable is given by:
SD = √106.75 (1 - 0.427)
SD = √106.75(0.563)
SD = 7.82
Therefore, the standard deviation is 7.82.
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Least common denominator: the smallest number that both denominator numbers will __ into.
Answers
The correct statement is,
''The smallest number that both denominator numbers will include into.''
What is Least common multiple?
The Least common multiple of two or more numbers are the smallest number that is multiple of two or more numbers.
Given that;
The statement is,
The smallest number that both denominator numbers will __ into.
Now,
We know that;
The LCM of two or more numbers is divided by the numbers or its include all the numbers.
Thus, The correct statement is,
''The smallest number that both denominator numbers will include into.''
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Using only a compass and a straightedge, you are constructing a line perpendicular to AB and passing through a given point, M, on AB. With a
compass of set width, you have drawn arcs that intersect AB on each side of M and marked the two intersection points as P and Q.
The next step in this construction is to place the compass needle on
Answers
P (or Q) and mark an arc roughly where M's reflection across AB is located.
How to use a compass?One tool for drawing circles is a compass. According to the circle's radius, which is drawn with a compass, the sizes of the circles vary.
A compass's handle is held in place by our thumb and forefinger. A circle is typically drawn using just one hand. Between the forefinger and thumb, the compass is turned.
Around this point, the pencil tip is rotated. The circle's radius is determined by the distance between the pencil tip and the compass needle. A ruler is used to set it. The gap can be adjusted by adjusting the angle between the compass's arms.
At that point of reflection (M'), arcs drawn from P and Q in M's approximate location across AB will intersect. As desired, the line passing through point M and perpendicular to AB will connect M and M'.
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PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
Step-by-step explanation:
That's a lot of exclamation marks :DDDDD
Rate of change, Δ often said as "delta" or also known as slope of a line. Rate of change is much easier when it's a line
it's just the slope of the line.
I see that the line in the picture... so the graph of the line.... is going down 1 after it goes over 4... so rate of change is rise over run..
-1 / 4
see how I got that?
so B) looks good
What is the vertex of f(x)=-3(x+1)^2-4
Answers
Answer:
vertex = (- 1, - 4 )
Step-by-step explanation:
the equation of a parabola in vertex form is
f(x) = a(x - h)² + k
where (h, k ) are the coordinates of the vertex and a is a multiplier
f(x) = 3(x + 1)² - 4 ← is in vertex form
with vertex = (- 1, - 4 )
Answer:
(−1,−4)
Step-by-step explanation:
f(x)=3(x+1)2−4
given
please help (please state your reason for the answer aswell)
Answers
Answer:
m∠C = 30°Step-by-step explanation:
Since the two angles of both triangles are congruent, it makes the remaining angles congruent too:
∠C ≅ ∠FThen we have:
x = 2x - 302x - x = 30x = 30So both C and F are 30°.
determine whether AB and CD are parallel, perpendicular or neither for A(-1,-1), B(1,5), C(1,2), D(5,4), graph each line to verify your answer.
Answers
By finding the slopes of the two segments we can see that the segments are not parallel nor perpendicular.
Are the segments parallel, perpendicular or neither?The slope for a segment whose endpoints are:
(x₁, y₁) and (x₂, y₂) is:
slope = (y₂ - y₁)/(x₂ - x₁)
Two segments are:
parallel if have the same slope.perpendicular if the product of the slopes is -1.Segment AB has endpoints (-1, -1) and (1, 5), so the slope is:
s = (5 + 1)/(1 + 1) = 3
For segment CD the endpoints are (1, 2) and (5, 4), so the slope is:
s' = (4 - 2)/(5 - 1) = 2/4 = 1/2
So the slopes are different and their product is obviously not -1, then the lines are neither parallel nor perpendicular.
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farmer determined the equation "y = "-7/3x" + 72.75" best fits this data when comparing the weight, y, in grams, of strawberries to the average daily mean temperature, x, in °F, each season. Which statement best describes the rate of change of the equation?
Answers
The statement that best describes the rate of change of the linear function is given as follows:
For each increase of 1ºF in temperature, the average weight of the strawberries decays by 7/3 grams.
How to obtain the average rate of change of a linear function?The slope-intercept definition of a linear function is given as follows:
y = mx + b.
The coefficients are listed as follows:
m is the slope of the linear function, representing the rate of change of the function, that is, by how much the output of the function changes when the input increases by one.b is the y-intercept of the function, which is the value of the output when the input is of zero.The input and the output variables for this problem are given as follows:
Input: Average daily mean tempetature, in ºF.Output: Weight of the strawberries, in grams.The function is defined as follows:
y = -7x/3 + 72.75.
Hence the slope is:
m = -7/3.
And the interpretation, considering the input and output variables, is that for each increase of 1ºF in temperature, which is the input variable, the average weight of the strawberries, which is the output variable, decays by 7/3 grams.
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The barge Califa building in Dubai united Arab emirate eighth i one of the tallet building in the world at 2722 feet tall in American football field i 360 feet in length approximately how many football field tall i the Burberry Califa building round to the nearet 10th
Answers
The burj khalifa is 7.56 football fields tall .
We have the height of the Burj Khalifa as = 2722 feet
And the given height of one football field is = 360 feet
Now using the Unitary method we can calculate the number football fields that would be equal to the height of the burj khalifa .
So ,
360 feet is equal to football fields = 1
1 feet is equal to football fields = 1/360 fields
therefore
2722 feet will be equal to fields = (1/360) x 2722
= 7.56 fields
So the Burj Khalifa is equal to 7.56 football fields.
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PLEASE HELP ME I REALLY NEED IT
Answers
Answer:
-1/2
Step-by-step explanation:
Ignore the (2,2) just use (-2,1) and (-4,2)
Use properties to rewrite the given equation. Which equations have the same solution as 2. 3p – 10. 1 = 6. 5p – 4 – 0. 01p? select two options. 2. 3p – 10. 1 = 6. 4p – 4 2. 3p – 10. 1 = 6. 49p – 4 230p – 1010 = 650p – 400 – p 23p – 101 = 65p – 40 – p 2. 3p – 14. 1 = 6. 4p – 4.
Answers
The equations 2.3p - 101 = 6.49p -4 and 23p - 101 = 65p - 40 - p are the equation that has the same solution:
The given equation is:
2.3p - 10.1 = 6.5p - 4 - 0.1p
The first option is:
2.3p - 10.1 = 6.4p - 4
which is equal to the given equation.
The second option:
230p - 1010 = 650p - 400 - p
which is not equal to the given equation
The third option:
23p - 101 = 65p - 40 - p
which is equal to the given option.
The last option:
2.3p - 14.1 = 6.4p -4
which is not equal to the given option.
Therefore equations 2.3p - 10.1 = 6.4p - 4 and 23p - 101 = 65p - 40 -p are the correct option.
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how do you find the measure of each angel indicated??
Answers
Answer:
by knowing the sum of the shape represented
Please help me it’s due.
Answers
Answer:
A = Research question
B = Hypothesis
C = Analysis of data
D = Reflecting on the results
Step-by-step explanation:
Im 85% sure
If I add 5 times a number to 6, I get 80................................
Answers
x = 14.8 (OR) x = 74/5.
Step-by-step explanation:
If you add 5 times a number to 6 you will get 80.
We don't know what number is multiplied with five and that number should added with 6. So,
Let, the unknown number be named as x.
The eqⁿ will be
[tex]{ \red{ \sf{5}}}{ \green{ \sf{x}}} \: + \: { \red{ \sf{6}}} = { \red{ \sf{80}}} → Eqⁿ(1) [/tex]
Shift 6 to the right side.
[tex]{ \red{ \sf{5}}}{ \green{ \sf{x}}} = { \red{ \sf{80 - 6}}}[/tex]
[tex]{ \red{ \sf{5}}}{ \green{ \sf{x}}} = { \red{ \sf{74}}}[/tex]
Divide both the sides by 5. then,
[tex]{ \red{ \sf { \cancel{\frac{5}{5}}}}} { \green{ \sf{x}}} = {{ \frac{ \cancel{74} {}^{ \green{ \sf{{ 14.8}}}} }{ \cancel5}}} [/tex]
[tex]{ \red{ \boxed{ \purple{ \sf{x = 14.8}}}}} \: { \tt{(or)}} \: { \red{ \boxed{ \purple{ \sf{x = \frac{74}{5}}}}}} [/tex]
___________________________________
[tex]{ \red{ \sf{ \underline{verification}}}} [/tex]
Let us substitute the value of x in Eqⁿ(1) then,
[tex]{ \red{ \sf{5}}}{ \green{ \sf{(14.8)}}} \: + \: { \red{ \sf{6}}} = { \red{ \sf{80}}} [/tex]
[tex]{ \red{ \sf{74}}} \: + \: { \red{ \sf{6}}} = { \red{ \sf{80}}} [/tex]
[tex]{ \red{ \sf{80}}} = { \red{ \sf{80}}} [/tex]
Hence, our answer is correct
A plane is 141 mi north and 162 mi east of an airport. Find x, the angle the pilot should turn in order to fly directly to the airport. Round your answer to the nearest tenth of a degree.
Answers
The value of x = 41.02°
Trigonometric Ratios:The ratios of lengths of a right-angled triangle's sides are known as trigonometric ratios. These trigonometric ratios connect the ratio of a right triangle's sides to each angle.
The basic trigonometric ratios:sin = (Opposite side/ Hypotenuse)
cos = (Adjacent side/ Hypotenuse)
tan = (Opposite side/ Adjacent side)
Here we have
A plane is 141 m north and 162 m east of an airport.
x is an angle that the pilot should turn in order to fly directly to the airport.
[ The picture that can represent the above information is given below ]
From given figure
ABC is a right-angled triangle with a right angle at A
As we know from trigonometric ratios
Tan θ = Opposite side/Adjacent side
⇒ Tan x = 141/162
⇒ Tan x = 141/162
⇒ Tan x = 47/54
⇒ Tan x = 0.870
⇒ x = Tan⁻'(0.870)
⇒ x = 41.02°
Therefore,
The value of x = 41.02°
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3. The table below shows the temperature of an oven, in degrees Fahrenheit, t minutes
after it is turned on.
Oven Temperature
Time, t
(in minutes)
0
3
5
Temperature, F
(in °F)
70
160
220
10
370
An equation for a line of best fit for these data is F = 30t + 70. What is the slope of this
line, and what does it represent?
Answers
The slope of this line, and what it represent is: The slope is 30, and it represents the increase in temperature, in degrees Fahrenheit, each minute the oven is on.
How to identify and interpret the slope?Mathematically, the standard form of the equation of a line can be calculated by using this equation:
y = mx + c .......equation 1.
Where:
m represents the slope.x and y represent the variables.c represents the y-intercept.From the information provided, we have the following equation of line:
F = 30t + 70 ..........equation 2.
Comparing equation 1 and equation 2, we have:
Slope, m = 30, which is the increase in temperature of the oven in degrees Fahrenheit.
y-intercept, c = 70, which also represents the initial temperature of the oven in degrees Fahrenheit.
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Complete Question:
The table below shows the temperature of an oven, in degrees Fahrenheit, t minutes after it is turned on. An equation for a line of best fit for these data is F = 30t + 70. What is the slope of this line, and what does it represent?
answer choices
The slope is 30, and it represents the initial temperature, in degrees Fahrenheit, of the oven.
The slope is 70, and it represents the initial temperature, in degrees Fahrenheit, of the oven.
The slope is 30, and it represents the increase in temperature, in degrees Fahrenheit, each minute the oven is on.
The slope is 70, and it represents the increase in temperature, in degrees Fahrenheit, each minute the oven is on.
Reduce -34/87 to the lowest terms.
Answers
The value of the fraction -34/87 to the lowest term is still -34/87 as there's no common factor.
How to reduce to lowest term?A fraction is simply a piece of a whole. The number is represented mathematically as a quotient where the numerator and denominator are split.
To reduce to lowest term, divide the numerator and denominator by the greatest common factor to reduce a fraction to its simplest terms.
The steps involved are:
Divide the numerator (top number) and the denominator (bottom number) into prime factors.Remove any commonalities.Multiply the remaining numbers to get the numerator and denominator with the reduced numerator and denominator.In this case, there is no common factor and the value is still the same as -34/87.
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Find the distance from point A(-1. 7) to the line y = 3x. Round your answer to the nearest tenth.
Answers
Answer:
Step-by-step explanation:
This seems complicated, huh.
So think about the question. They want to know the distance from a line, to a point. first decide if the point could possibly be on the line and there is zero distance. The given point is at (-1, 7) our coordinates of the point are at -1 in the X direction and at 7 in the Y direction. If we were to plug in those two number into the given line equation, y = 3x would it be a true statement? no. 7 = 3(-1) is not true. so our given point is not on the line. Next, find the right angle to the line and point. make your own line equation that does have our given point in it. and is at a right angle to the given line. recall that using a reciprocal can give you a right angle to your line. y = (- 1/3)X . Now we just need the given point to plug into our made up line equation and be true. 7 = (-1/3)(-1) + b . we need to make this equation true by moving a number into "b" that makes it true.
b = 6[tex]\frac{2}{3}[/tex] or [tex]\frac{20}{3}[/tex]
7 = (-1/3)(-1) + [tex]\frac{20}{3}[/tex]
now, when does our made up line, y =(-1/3)x + [tex]\frac{20}{3}[/tex], intersect with the given line, y=3x, that is, set the two equal
3x = (-1/3)x + [tex]\frac{20}{3}[/tex]
3[tex]\frac{1}{3}[/tex] X = [tex]\frac{20}{3}[/tex]
[tex]\frac{10}{3}[/tex]X = [tex]\frac{20}{3}[/tex]
X=[tex]\frac{20}{3}[/tex] * [tex]\frac{3}{10}[/tex]
X = [tex]\frac{20}{10}[/tex]
X=2
our two equations intersect at 2, how handy :)
now we have our two points that are at a right angle from each other and we just need the distance from them
(given) A(-1,7) and (found) B(2,6)
Distance = [tex]\sqrt{(x2-x1)^{2} + (y2-y1)^{2} }[/tex]
then our given points are A(x1,y1) and B(x2,y2)
Distance = [tex]\sqrt{(2-(-1))^{2}+(6-7)^{2} }[/tex]
Distance =[tex]\sqrt{3^{2}+(-1)^{2} }[/tex]
Distance = [tex]\sqrt{9+1}[/tex]
Distance = [tex]\sqrt{10}[/tex]
Distance = 3.1622
Distance =3.2 (rounded to nearest 10th)
Yes, that was kinda a lot :/
The area of a rectangle and its length, if its width is 2cm
Answers
The area is 35, which means LW=35.
We also know that width is two less than the length.
If we represent the length width X, then L=X-2. Using our area function X*L=35, we substitute our new value of L for X-2 and get X(X-2)=35. Distribute to get X2-2X=35 → set equal to zero by subracting 35 from both sides X2-2x-35=0.
With this polynomial, we find the factors. Two factors of 35 that have a digit difference of 2 are 5 and 7, but one has to be negative since 35 is negative in our polynomial and it must be the larger one because we have -2X instead of +2X in the middle. We get -7 and 5.
We can write our new factors as
(X-7)(X+5)=0, giving us critical values of 7 and -5. We aren't able to have negative lengths so our X value is 7. That's our Width. To find our Length we use L=X-2 → L=7-2 → L=5
There you have it, the Length is 5 cm and the width is 7 cm