The error term in a regression equation is said to exhibit homoscedasticity if it has the same variance for all values of the explanatory variable.
What is Homoscedasticity?This is a condition in which equal variance is assumed for different groups of data or variables.
The same variance will be observed in the variable in the error term of a regression equation hence option C was chosen.
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One day in a sporting goods store, 34 people came in and made purchases while 14 people came in but didn't buy anything. What's an unsimplified ratio, as a fraction, of the number of people who made a purchase and the number of people who came into the store
Answer:
34/48
Step-by-step explanation:
So to answer this problem, we need to know two things:
1) The number of people who made a purchase
2) The number of people who came into the store
The problem gives us 1), which is 34.
The answer for 2) is 34+14, since that's the total number of people who came into the store. This means that the ratio is 34/48.
7. A triangle has an area of 20 in². If the height of the
triangle is 5 inches, find the base of the triangle.
Step-by-step explanation:
the area of a triangle is
baseline × height / 2
in our case
baseline × 5 / 2 = 20 in²
baseline × 5 = 40
baseline = 8 in
Evaluate.
10! over
6!(12-8)!
Answer: 210
Step-by-step explanation:
! means, for example, 6! = 6 * 5* 4 * 3 * 2 * 1
Given:
[tex]\displaystyle \frac{10!}{6!(12-8)!}[/tex]
Subtract:
[tex]\displaystyle \frac{10!}{6!(4)!}[/tex]
Distribute:
[tex]\displaystyle \frac{10!}{6!*4!}[/tex]
Expand:
[tex]\displaystyle \frac{10 * 9 * 8 * 7 * 6 * 5* 4 * 3 * 2 * 1}{(6 * 5* 4 * 3 * 2 * 1)*(4 * 3 * 2 * 1)}[/tex]
Cancel out (6*5*4*3*2*1) in both the top and bottom as they equal 1:
[tex]\displaystyle \frac{10 * 9 * 8 * 7 }{4 * 3 * 2 * 1}[/tex]
Multiply:
[tex]\displaystyle \frac{5,040 }{24}[/tex]
Divide:
210
If the perimeter of this triangle is 15 centimeters, what is the value of n?
The value of n from the triangle = 2.5
Calculation of perimeter of trianglePerimeter of a triangle= a +b+c
Where,
a= n
b= 5n - 6
C= 2n + 1
P= 15
Therefore n
15 = n + 2n + 1 + 5n - 6
15 = 8n-5
8n= 15+5
8n = 20
n= 20/8
n= 2.5
Therefore, the value of n = 2.5
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What is the inverse of f(x)=x^4+7 for x>0 where function g is the inverse of function f?
-
Answer:
[tex]g(x) = \sqrt[4]{x-7},~ x\geq 7[/tex]
Step by step explanation:
[tex]y= f(x) = x^4+7\\\\\text{Replace x with y and solve for y:}\\\\~~~~~~~x = y^4 +7\\\\\implies y^4 = x-7\\\\\implies y = \pm\sqrt[4]{x-7}\\\\ \implies f^{-1}(x) = \pm\sqrt[4]{x-7}[/tex]
Enter the number that belongs in the green box.
Answer:
the green box is 0
Step-by-step explanation:
we are asked to find the x-intercept, which means y = 0
(x, y)
Another way to test this is plug it in 1 for x! (1, y) where x = 1
[tex]y = \frac{2x^{2} -3x+1}{2x^{2} +8x+6} \\\\[/tex]
[tex]y = \frac{2(1)^{2} -3(1)+1}{2(1)^{2} +8(1)+6}[/tex]
[tex]y = \frac{2(1) -3(1)+1}{2(1) +8+6}[/tex]
[tex]y = \frac{2 - 3 + 1}{2 + 8 + 6}[/tex]
[tex]y = \frac{-1+1}{10 + 6}[/tex]
[tex]y = \frac{0}{16}[/tex]
y = 0
f(x) =2x^2+4x-6. g(x)=4x^3-6x^2+3 find (f+g)(x)
Answer:
=4x³-4x²+4x-3
Step-by-step explanation:
(f+g)(x)=4x³+2x²-6x²+4x-6+3
=4x³-4x²+4x-3
Peter built a chest that measures 2 feet by 11
2
feet by 1 foot. He wants to fill the chest with plastic coins.
A prism has a length of 2 feet, height of 1 foot, and width of 1 and one-half feet.
What is the maximum amount of space that the chest can hold?
The maximum amount of space is
cubic feet.
Answer:
3
Step-by-step explanation:
got it on edge
1940 people attended a basketball game. 679 of the people attending supported the home team, while 1261 supported the visiting team. What percentage of people attending supported the home team?
Answer:
35%
Step-by-step explanation:
The percentage is calculated by dividing the required value by the total value and multiplying by 100.
Required percentage value = a
total value = b
Percentage = a/b x 100
The percentage of people who supported the home team is 35%.
The percentage is calculated by dividing the required value by the total value and multiplying by 100.
Required percentage value = a
total value = b
Percentage = a/b x 100
Example:
50% = 50/100 = 1/2
20% = 20/100 = 1/5
25% = 25/100 = 1/4
We have,
Number of people who attended the basketball game = 1940
Number of people who supported the home team = 679
Number of people who supported the visiting team = 1261
The percentage of people who supported the home team.
= [ Number of people who supported the home team / Total number of people who attended the basketball game ] x 100
= [679 / 1940] x 100
= 67900 / 1940
= 35%
Thus,
The percentage of people who supported the home team is 35%.
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Solve for x. Round to nearest tenth
SOMEONE PLEASE HELP ME WITH THIS ILL GIVE YOU BRAINLIST ANSWER
Image above
Answer:
x ≈ 0.5
Step-by-step explanation:
using the tangent ratio in the right triangle
tan63° = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{IJ}{JK}[/tex] = [tex]\frac{1}{x}[/tex] ( multiply both sides by x )
x × tan63° = 1 ( divide both sides by tan63° )
x = [tex]\frac{1}{tan63}[/tex] ≈ 0.5 ( to the nearest tenth )
Answer:
x = 0.5
Step-by-step explanation:
We can use tan Θ to find the value of x.
tan Θ = Opposite ÷ Adjacent
Let us solve it now
tan 63 = 1 ÷ x
1.9626 = 1 ÷ x
x = 1 ÷ 1.9626
x = 0.5095
x ≈ 0.5 ( nearest 10th )
Question 4
1 pts
in 2013, the number of rabbits in a local park is 120, but this number is decreasing
each year by a constant percent. the number of rabbits in the park t years after 2013
can be found using the given formula. about how many rabbits will be left in the park
after 10 years?
r=120(0.99)
1,188
247
1
108
After 10 years, there will be 108 rabbits left in the park.
What is Exponential Equation?An exponential function is a function of form f (x) = aˣ, where “x” is a variable and “a” is a constant which is called the base of the function and it should be greater than 0.
Here, the given equation;
R = 120 (0.99)ⁿ
where, n is the number of years
n = 10 years (given)
R = 120 (0.99)¹⁰
R = 120 X 0.904
R = 108.52
Thus, After 10 years, there will be 108 rabbits left in the park.
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please help!
[3 x 2⁵ - 13 x (-2)] + 2³
(-2² +3²) - 3
Give your answer in simplest form.
Answer:
122x + 37
Step-by-step explanation:
hope this helps u
Answer:
[3×2⁵+13×2]+2³(-2²+3²)-3=
[3×32+26]+2³(-4+9)-3=
[96+26]+2³(5)-3=
122+40-3
162-3=
159...
note:-a×(-b)=+ab
At what rate per cent per annum will rs 6000 amount to rs 6615 in two years when interest is compounded annually?
Answer: 5%
Step-by-step explanation:
[tex]6615=6000(1+r)^{2} \\ \\ 1.1025=(1+r)^{2} \\ \\ 1.05=1+r \\ \\ r=0.05=\boxed{5\%}[/tex]
In Walter's class, 14 of the 25 students ride the bus. In Sasha's class, 11 of the 20 students ride the bus. Which class has a greater percent of students who ride the bus?
The class which has a greater percent of students who ride the bus is Walter's class
How to find percentage?Walter's class:
14 of the 25 students ride the busPercentage of students who ride bus = 14 / 15 × 100
= 0.933 × 100
= 93.3%
Sasha's class:
11 of the 20 students ride the busPercentage of students who ride bus = 11 / 20 × 100
= 0.55 × 20
= 55%
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2x(x-5) -x (3 + 2x) = 26
help me pls
Answer:
x = -2
Step-by-step explanation:
[tex]2x(x-5)-x(3+2x) = 26\\2x^{2} -10x-3x-2x^{2} = 26\\-13x=26\\x=\frac{26}{-13} \\=-2[/tex]
Its basically the order of operations, from left to right , evaluate brackets (if possible), then multiplication or division, lastly followed by addition or subtraction.
2x2-10x-3x-2x2=26
Eliminam opusele
reducem termenii
-13x=26
imparte ambele parti
x=-2
Step-by-step explanation:
What is the area, in square units, of the polygon shown here?
A figure in the shape of a block letter L with a vertical height of 8 units and a length of 5 units is shown. The length of the top of the L is 2 units and the height of the right side of the L is 1 unit.
14 units2
16 units2
17 units2
19 units2
The area of a 2D form is the amount of space within its perimeter. The correct option is D.
What is an area?The area of a 2D form is the amount of space within its perimeter. It is measured in square units such as cm², m², and so on. To find the area of a square formula or another quadrilateral, multiply its length by its width.
The area of the L block will be the sum of the area of A and B. Therefore, the area can be written as,
Area of L block = Area of A + Area of B
= (7×2) units² + (1 × 5) units²
= 14units² + 5units²
= 19units²
Hence, the correct option is D.
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Jenny spins a fair 4-sided spinner what is the probabiliity that the spinner will land on a or b
Answer:
Step-by-step explanation:
jenny spin a fair-4 spinner
The probability that the spinner will land on a or b will be 0.50.
What is probability?Its fundamental concept is that someone will nearly surely occur. The proportion of positive events in comparison to the total of occurrences.
Then the probability is given as,
P = (Favorable event) / (Total event)
Jenny spins a fair 4-sided spinner.
Let the section be marked as a, b, c, and d.
Then the total number of the event will be given as,
Total events = 4
Then the probability that the spinner will land on a or b will be given as,
P = 1/4 + 1/4
P = (1 + 1)/4
P = 2/4
P = 1/2
P = 0.50
The probability that the spinner will land on a or b will be 0.50.
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Amelie wants to decorate the outside of the box but not the bottom. It is a 5 in. by 3 in. by 2 rectangular prism. If the beads that she is using cost $0.25 per square inch, how much will she pay for the beads? Her work is shown. surface area = 15 + 15 + 6 + 6 + 10 + 10 = 62 in. 2 cost = 0.25(62) = $15.50 Did she make an error? Yes, she should have only added the area of five of the six faces. Yes, she did not use the correct area formula for a rectangle. Yes, she calculated the cost incorrectly. No, she didn’t make any errors.
Answer:
Yes, she should have only added the area of five of the six faces.
Step-by-step explanation:
The formula for determining the surface area of a cuboid or box is expressed as
Surface area = 2lw + 2lh + 2wh
Where l, w and h represents length, width and height of the box respectively.
2lw represents the area of the top and the bottom of the box. Since she doesn't want to cover the bottom, it becomes lw. Therefore,
Surface area = 15 + 6 + 6 + 10 + 10 = 47 in².
The cost would be
0.25 × 47 = $11.75
Therefore,
Yes, she should have only added the area of five of the six faces.
Stuck on this. 60 points!
Answer:
Statement 1 and 2
Step-by-step explanation:
If you take t^2 - 16t + 55 and find some of its graphical values, you will get:
Turning point: (8,-9)
Roots: (5,0) and (11,0)
When this graph is plotted and you imagine the x axis to be time (as stated in the question), each of the roots (x - intercept) must be when the swimmer goes under and when they come back up.
This means that the swimmer dived under the water at 5 seconds and came back up at 9, making the first 2 statements correct.
Now the fourth statement is ruled out.
The fifth statement is not plausible as the graph would have to have more than 2 roots for the swimmer to enter the water twice.
That leaves the third statement. If you imagine the depth of the swimmer to be the y axis of our imaginary graph, and we know that the y axis of the turning point is -9, that means that the swimmer's deepest dive was 9 feet under the water, ruling out the third statement too.
Hope this helps :D
Answer:
[tex]h(t)= (t-5)(t-11)[/tex]
The swimmer comes back up 11 seconds after the timer is started.
The swimmer dives into the water 5 seconds after the timer is started.
Step-by-step explanation:
Given function:
[tex]h(t)=t^2-16t+55[/tex]
To factor a quadratic in the form [tex]ax^2+bx+c[/tex],
find two numbers that multiply to [tex]ac[/tex] and sum to [tex]b[/tex]:
[tex]\implies ac=55[/tex]
[tex]\implies b=-16[/tex]
Two numbers that multiply to 55 and sum to -16 are: -11 and -5
Rewrite b as the sum of these two numbers:
[tex]\implies t^2-11t-5t+55[/tex]
Factorize the first two terms and the last two terms separately:
[tex]\implies t(t-11)-5(t-11)[/tex]
Factor out the common term (t - 11):
[tex]\implies (t-5)(t-11)[/tex]
Therefore, the given formula in factored form is:
[tex]h(t)= (t-5)(t-11)[/tex]
The swimmer's depth is modeled as h(t). Therefore, when h(t) = 0 the swimmer will be at the surface of the water.
[tex]\implies h(t)=0[/tex]
[tex]\implies (t-5)(t-11)=0[/tex]
[tex]\implies t-5=0\implies t=5[/tex]
[tex]\implies t-11=0 \implies t=11[/tex]
Therefore, the swimmer will be at the surface of the water at 5 s and 11 s.
The swimmer's maximum depth is the vertex of the function. The x-value of the vertex is the midpoint of the zeros. Therefore, the x-value of the vertex is t = 8.
Substitute t = 8 into the function to find the maximum depth:
[tex]\implies h(8)=8^2-16(8)+55=-9[/tex]
So the swimmer's maximum depth is 9 ft.
True Statements
The swimmer comes back up 11 seconds after the timer is started.
The swimmer dives into the water 5 seconds after the timer is started.
Which of the following is the solution set of 6x + 5 = -29?
O {-4}
O {-17/3)
O (17/3)
Answer:
-[tex]\frac{17}{3}[/tex]
Step-by-step explanation:
I would really appreciate it if someone helped answer these 4 questions. I will rate 5 stars. Thank you (:
Answer:
7. 13.6
8. 19.5
9. 6.5
10. 12.6
Step-by-step explanation:
Recall the three main trig functions
Sine = opposite / hypotenuse
Cosine = adjacent / hypotenuse
Tangent = opposite / adjacent
( remember hypotenuse = longest side length , opposite = side length opposite of angle , and adjacent = side length thats not the opposite or hypotenuse )
We will use these to solve each problem
7.
We are given :
An angle with a measure of 39 degreesThe angles opposite side length The adjacent side as the unknownWhen dealing with opposite and adjacent we use tangent
We have tan = opp / adj
==> plug in opp = 11 and adj = x as well as given angle 39
tan(39) = 11/x
==> multiply both sides by x
xtan(39) = 11
divide both sides by tan(39)
x = 11/tan(39)
plugging this into a calculator , we get x = 13.6 ( rounded )
8.
We are given :
an angle with a measure of 46 degreesthe hypotenuse which has a length of 28and the adjacent as the unknownWhen dealing with adjacent and hypotenuse we use cos
We have cos = adj / hyp
==> plug in given angle 46 , adj = x and hyp = 28
cos(46) = x/28
==> multiply both sides by 28
x = 28cos(46)
plugging this into a calculator we get x = 19.5 ( rounded )
9.
We are given :
an angle with a measure of 51 degreesits opposite side length with a length of 8 the adjacent side length as the unknownWhen dealing with the opposite and adjacent we use tangent
We have tan = opp / adj
==> plug in 51 degrees for angle , opp = 8 and adj = x
tan(51) = 8/x
==> multiply both sides by x
xtan(51) = 8
==> divide both sides by tan(51)
x=8/tan51
plugging this into a calculator we get that x = 6.5 ( rounded )
10.
We are given:
an angle with a measure of 24 degreesthe hypotenuse which has a length of 31the side length opposite of given angle as the unknownWhen dealing with the opposite and hypotenuse we use sine
We have sin = opp / hyp
==> plug in angle as 24 , opp = x and hyp = 31
sin(24) = x / 31
==> multiply both sides by 31
31sin(24) = x
plugging this into a calculator we get that x = 12.6 ( rounded )
And we are done!
Let me know if you have any doubts in the comments ! : )
13 = m/4 + 7 can you show work too
The correct value of this equation is m = 24
Resolution methodThis equation contains a fractional term. We note that the denominator of this equation is the term 4. Therefore, we will multiply the sides by 4:
13 = m/4 + 7
13 . 4 = 4(m/4) + 7 . 4
52 = m + 28
Now, let's isolate the variable "as negative" and after the equality - we'll be subtracting the terms:
52 = m + 28
-m = 28 - 58
-m = -24
m = 24
Therefore, the correct value of this equation will be m = 24
If x^2+y^2=13 and xy=6 then find the value of x^4+y^4
Recall that (a + b)² = a² + 2ab + b².
Let a = x² and b = y². Then
(x² + y²)² = (x²)² + 2x²y² + (y²)²
⇒ x⁴ + y⁴ = (x² + y²)² - 2 (xy)²
Given that x² + y² = 13 and xy = 6, we have
x⁴ + y⁴ = 13² - 2×6² = 97
What is the area of the following triangle in square meters? Do not round your answer.
A
=
m
2
The area of the triangle will be 3240 square centimeters.
What is the triangle?A triangle is a three-sided polygon with three angles. The angles of the triangle add up to 180 degrees.
The diagram is given below.
The height of the triangle is 120 cm and the base of the triangle is 54 cm.
Then the area of the triangle will be
Area = 1 / 2 x 120 x 54
Area = 3240 square cm
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Answer:
0.324
Step-by-step explanation:
What is the area of a polygon with vertices of (-2,-4), (4,-4), (4, 4), and (-5, 4)?
216 square units
30 square units
120 square units
60 square units
Answer: 60 square units
Step-by-step explanation: i hope that helps buddy :)
3. Given the triangle below. Point T is the circumcenter. Point E bisects side MO. TE measures a length of 5. What is the length of MT? Round your answer to the nearest tenth.
Answer:
6.4
Step-by-step explanation:
E bisects side MO, plot it in the center of M and O
MO is 8, split into two even parts, 4 and 4
TE is 5
set up Pythagorean theorem, 5^2 + 4^2 = x^2 to find MT
25+16=x^2
41=x^2
x=6.403
Please help! Giving brainlist!
Calvin deposits $400 in a savings account that accrues 5% interest compounded monthly. after c years, calvin has $658.80. makayla deposits $300 in a different savings account that accrues 6% interest compounded quarterly. after m years, makayla has $613.04. what is the approximate difference in the number of years that calvin and makayla have their money invested?
The approximate difference in years for Calvin and Makayla is that B. Makayla invests her money 2 years longer.
Calculations and Parameters:Given:
Interest rate= 5%Deposit of Calvin= $400Final amount after c years= $658.80We use the compound interest formula,
[tex]A= P(1 + r/t)^t[/tex]
[tex]658.8/400= (1205/1200)^1^2^c[/tex]
c= 10 years approx.
For Makayla,
Amount deposited= $300Interest rate= 6%Final amount= $613.4m= ?We use the same formula:
[tex]A= P(1 + r/t)^t\\[/tex]
[tex]613.4/300= (1206/1200)^1^2^m[/tex]
m= 12 years approx.
Hence, the difference in the years would be:
12-10
= 2 years.
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Answer:
Makayla invests her money 2 years longer
Step-by-step explanation:
b on edge
Help!! Due tomorrow. x(x − 8) = 0
Answer: x = 0, 8
Step-by-step explanation:
x = 0
x - 8 = 0 ⇒ x = 8 (move 8 to the right)
x = 0, 8
Please help me, greatly appreciate it!
Answer: See the screenshots below
I'm answering in this format because the questions aren't numbered, so its hard to reference them consistently (so we're both on the same page).
All decimal values are approximate. I decided to round to 4 decimal places, but feel free to use another level of precision.