Answers
Answer:
Use the process of elimination. I'll only do one example since you have 4.
Step-by-step explanation:
Let's do the first question.
2x-3y=-11
2x+y=9
Our goal here is to be left with one variable to solve, this way we can use the answer for that variable to find the other. A.K.A only find X to plug into the equation to find Y. To do this, we'll use the process of elimination, in which we need to cancel out a variable.
X seems the easiest here. To cancel 2 (in the top equation), you need to have a -2. And that -2 needs to be the x coefficient in the 2nd equation, in order for us to "cancel" it out. To get -2, you multiply 2 by -1.
-1(2x+y)= -1(9)
Note that whatever you do to one side, you need to do it to both sides! Hence, why I also multiplied 9 by -1. You should now be left with:
-2x -y = -9
Now, we cancel out the positive 2 and -2 from both equations by adding the two equations.
2x-3y= 11
+
-2x-y=-9
X cancels out, so we're left with -4y=-20. Solve for Y, which is 5.
-4y=-20
y=5
Now that you have the Y value, plug it into any of the two equations to find your X value.
2x-3y=11
2x-3(5)=11
2x-15=11
2x=26
x=13
And voilah! Our Y value is 5, and our X value is 13.
It's pretty simple once you understand what's going on. All that we did was to cancel out one variable (either X or Y) in the two equations so that we're left with only one variable to solve. If we cancel out X, we only need to solve for Y. You do this by manipulating one of the two equations (doesn't matter which one). Once you find either X or Y, all you need to is to plug it into one of the original equations. Then, you'll have both X and Y.
And that my friend, is the process of elimination. Good luck!
Related Questions
Sam’s Soups is open 6 days a week, 76 hours in all. Its hours are the same every day, except on Saturday and Sunday. On those days, it is open 2 hours longer. How long is Sam’s Soups open on Sunday? Use an equation to solve.
Answers
Answer:
14 hours
Step-by-step explanation:
Let x be the number of hours open on each of the four days (because it is six days per week) that are not Saturday or Sunday. Thus, the total number of hours on those days would be 4x. Then, we are told that Sam's Soups are open 2 hours longer on Saturdays and Sundays, so that would be x + 2. There are two of those days, so that would be 2(x + 2). Since all of these hours total 76, we have our equation:
4x + 2(x + 2) = 76
4x + 2x + 4 = 76
6x = 72
x = 12
Remember, 12 hours is the number of hours that Sam's Soups is open on days that are not Saturday and Sunday. Those days are x + 2. Thus, that is 12 + 2 = 14 hours.
Answer:
14 hours
Step-by-step explanation:
x = hours on day other than saturday and sunday
y = hours on Saturday and Sunday.
Sam's soups are only open 6 days a week, and 2 are weekends, so it is only open on 4 weekdays.
4x + 2y = 76
We know the hours on Saturday and Sunday are 2 hours more than the weekday hours.
So,
y = x + 2
Substituting that back into the original equation,
4x + 2(x+2) = 76
4x + 2x + 4 = 76
6x = 72
x = 12
y = 14
So Sam's Soups is open 14 hours on Sunday.
What is the difference between a ratio and its related rate and unit rate?
Answers
Answer:
The difference between a rate and a unit rate is that a rate is a ratio between two different units of measure. In comparison, a unit rate is a ratio between two different units of measure for a single thing. I hope this helps! :)
Step-by-step explanation:
Answer: a ratio consists of two numbers such as 10:5 while a unit rate is the rate that something is going at
Step-by-step explanation:
Question
Solve the equation.
−8(y+9)=−40
y=?
Answers
Answer:
y+9= -40/-8
y+9= 5
y=5-9
y= -4
PLEASE HELP!!!!!!!!!!!!!!!!!
WILL MARK BRAINLIEST
What is 5,890,000 in Scientific Notation?
Answers
Answer:
5.89 x 10^6
The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.
Calculating scientific notation for a positive integer is simple, as it always follows this notation:
a x 10b
Follow the steps below to see how 5,890,000 is written in scientific notation.
To find a, take the number and move a decimal place to the right one position.
Original Number: 5,890,000
New Number: 5.890000
count how many times you moved the decimal and that's your power
in this case it's ^6
I don't understand please answer?
Answers
Answer:
B) symmetric bar graph
Step-by-step explanation:
U shaped symmetric
Thats the answer js pick the one
what is the answer for 5/8x + 4 = 3/8x + 12
Answers
Answer:
x=32
Step-by-step explanation:
Answer:
x = 32
Step-by-step explanation:
Graph this function: y=|x–3|+3
Answers
Answer:
Here is the graphed visual of the equation.
Y : 5,4,3,4,5
Hi there! Please help me asap and explain how you did it... Tysm!♡♡
Answers
Answer:
A = ( -1 , 4 )
B = ( -4 , 3 )
C = ( -2 , 1 )
Explanation:
You basically just flip it along the line like a mirror would
A = ( -1 , 4 )
B = ( -4 , 3 )
C = ( -2, 1 )
Basically, you match the coordinates of the image to the other part and see the new coordinates. It's like seeing something in a mirror, but with a different view.
(Hope it helps!)
If the product of 6 integers is negative, at most how many of the integers can be negative?
Answers
Answer: 5 negatives
Step-by-step explanation:
A toy company's total payment for salaries for the first two months of 2012 is $40,765. Write and solve an equation to find the salaries for the second month if the first month’s salaries are $10,205.
Answers
Answer:
its D
12,455 + x = 23,894
x = 10,560
Step-by-step explanation:
Let's say that the variable 'x' represents the salaries for the second month, so out equation would be:
10,205 + x = 23,894
To solve, we must isolate the variable by subtracting 12,455 from both sides:
10,205 + x = 23,894
-10,205 -10,205
x = 10,560
So, the second month's salary was $10,560
Step-by-step explanation:
Answer: x = $30,560
Step-by-step explanation:
1. Let the second month payment be x
2. The first month + The second month = both of the months
3. So substituting: 10,205 + x = 40,765
4. Subtract 10,205 from both sides: x = 30,560
The amount of money you spend on x CDs and y DVDs is given by the equation 14x+18y=126. Find the intercepts.
Need this soon please
Answers
Answer:
The y intercept is (0,7) The x intercept is (9,0)
Step-by-step explanation:
You set the x to zero if you want the y intercept and vice versa for the x intercept.
14x+18y=126 y intercept
14(0)+18y=126
0+18y=126
18y=126 divide by 18
y=7
do the same thing for the x intercept except set the y to 0
I love you guys, I really rely on brainly, which probably isnt a good thing but here we are lol. Heres my question
Answers
Answer: d=36
Step-by-step explanation:
9/2=4.5
36/8=4.5 :)
72=2d
D=36
What is 2 by the power of 3
A. 6
B. 8
C. 200
D. 400
E. 490
Answers
Because 2^3=2.2.2=8
It can be written by 2•2•2
A line has a slope of 5. It passes through points (1,4) and (6,y). What is the value of y?
Answers
Answer: y=29
Step-by-step explanation:
Based on the formula: slope= y2-y1/x2-x1
5=[tex]\frac{y-4}{6-1}[/tex]
5= y-4 / 5
5 x 5 =25
y-4=25
y=29
Answer: 5=
Step-by-step explanation:
m=y2-y1/x2-x1
since m=5 then
5=y-4/6-1
5=y-4/5
1=y-4
5=
3/4% of 801: Estimate
Answers
Answer:
6
Step-by-step explanation:
3/4 of 801 is approx 600
3/4 % of 801 would be this answer divided by 100 .... = 6
Thats answer you welcome
Which expression can be used to find the surface area of the triangular prism? Will give Brainliest!
Answers
Answer:
C
Step-by-step explanation:
It is usually A= 1/2 B*H which 1/2*3*4 in parentheses would fit this, but im not 100% sure!
• We have two congruent right triangles with bases=3 and heights=4
• 3 Rectangles, which all share the same width: width=2
Since we are dealing with two-dimensional figures, we must use the area formulas for them.
Area of triangle:
A=1/2•B•H
Area of a rectangle:
A=L•W
Because we have two congruent triangles, their areas must be congruent, too. So, we have double the area of one triangle. So, we can modify the formula:
A=2(1/2•B•H)
Because all three rectangles share the same width but have different lengths, we can add their lengths together to form one whole rectangle.
4+3+5=12
So, all three rectangles’ sides have been combined (added) to form one whole rectangle with the dimensions:
12 by 2.
Now, because the surface area is the total area used to form the faces of a 3-D shape, we must add all the areas of the figures together.
Area of a triangle (modified)
A=2(1/2•3•4)
Area of rectangle:
A=12•2
Simplify:
Triangle:
A=2(6)
A=12
Rectangle:
A=12•2
A=24
Now, let’s add the areas together:
12+24=36
So, the surface area is 36ft^2.
Now, to answer the question, option 3.) is correct
A: 2(1/2•3•4)+4•2+3•2+5•2
True or false, the fractions ¾ and 6/8 are equivalent.
A. True
B. False
Answers
Answer: A. True
Step-by-step explanation:
Julia decides to sell the baskets she doesn’t have room for. If she bought each of them for $8.50 and sells them for $12, what is percent of markup? What is her overall profit?
Answers
Given:
Cost = $8.50,Selling price = $12.00.Find markup:
$12.00 - $8.50 = $3.50Percent of markup:
3.50/8.50 × 100% = 41.18% (rounded)The number of baskets is not given. If it is x, then total profit is:
3.5x dollarsGiven:
Cost = $8.50,
The selling price = is $12.00.
Find markup:
$12.00 - $8.50 = $3.50
Percent of markup:
3.50/8.50 × 100% = 41.18% (rounded)
The number of baskets is not given. If it is x, then the total profit is:
3.5x dollars
Step-by-step explanation:
What does pemdas stand four ??
Answers
Answer:
Parentesis
Exponent
Multiplication
Division
Addition
Subtraction
Step-by-step explanation:
Answer: PEMDAS stands for parenthesis, exponents, multiplication, division, addition, subtraction
can someone tell me how to do this and how to find the answer
Answers
Answer:
the answer would be c.
Step-by-step explanation:
on the bar graph it says $9 per pound so it means the answer is c
The slope of the line is always rise/run.
This graph is rising $9 and running 1 pound, so it is 9/1.
Check that 12g is equivalent to 48%.
Answers
Answer:
See answers in the picture below.
Step-by-step explanation:
i need the answer to this please ;) and quick
Answers
Answer: Yes
Step-by-step explanation:
10: 10, 20, 30, 40, 50 , 60, 70, 80 , 90, 100, 110, 120
12: 12, 24, 36, 48, 60, 72, 84, 96, 108, 120
Both have 120 as a common multiple.
and 120 is the commom multiple
how many least common multiples of 10 and 12 are there one or infinitely many- 20 points to answer quickly
Answers
Answer:
Step-by-step explanation:
Least Common Multiple of 10 and 12 = 60 Step 1: Find the prime factorization of 10 10 = 2 x 5 Step 2: Find the prime factorization of 12.
Graphing Linear Equations in Standard Form
Answers
Answer:
y=-3/4x-3
Step-by-step explanation:
because you need to make it into graphing forms so you would transfer the 3 over and divide the 3 and the 12 to get y=-3/4x-3
The frequency table shows how many visits to the library students in a school have made in the last month.
Visits Frequency
0 7
1 54
2 142
3 276
4 92
5 23
Work out the mean.
Give your answer rounded to 1 DP.
Answers
The average weight of five cats is 5.2 kg. The weights of four of the cats are 5.4 kg, 5 kg, 4.8 kg, and 4.9 kg. Find the weight of the fifth cat.
Answers
Answer:
5.9 kg
Step-by-step explanation:
Remember! To find the average of things, you add them al up and divide by how many things there are. This is an important detail that will help us solve the problem
It says the average is 5.2
This means ...
( weight of cat 1 + cat 2 + cat 3 + cat 4 + cat 5 ) ÷ 5 = 5.2
Let's plug in all of the values we know to find the weight of cat 5
( 5.4 + 5 + 4.8 + 4.9 + CAT 5 ) ÷ 5 = 5.2
Let's add all of this up and solve this!
( 20.1 + CAT 5 ) ÷ 5 = 5.2
multiply 5 by both sides so we can get the weight of cat 5 alone
20.1 + CAT 5 = 26
subtract
CAT 5 = 26 - 20.1
CAT 5 = 5.9
the weight of cat 5 is 5.9 kg
The weight of cat five is 5.9g
Explanation:
The average of something can be found by adding all items together and then divide by how many items there are all together
Please help asap 95 points
Answers
Take 25.65 and divide by 19 (pounds).
The answer will be $1.35.
You can check your answer by multiplying 19 by 1.35 and getting 25.65.
Two stores advertise a discount on the same type of watch. At both stores, the original price of the watch was $35.00
Store A discounts the price of the watch by 20%
Store B discounts the price of the watch by 15%
How much less is the discounted price of the watch at store A than the discounted price of the watch at store B?
Answers
store B would pay: $29.79
The correct discounted amount of store A compared to store B is $1.79
Store A has $ 1.75 less discounted price than Store B.
What is Percentage?To determine the quantity or percentage of something in terms of 100, use the percentage formula. Per cent simply means one in a hundred. Using the percentage formula, a number between 0 and 1 can be expressed. A number that is expressed as a fraction of 100 is what it is. It is mostly used to compare and determine ratios and is represented by the symbol %.
Given:
The original price of the watch was $35.00
Store A:
Discount = 20%
So, price after discount = 35 - 35 x 0.20
= $28
and, Store B:
Discount = 15%
So, price after discount = 35 - 35 x 0.15
= $29.75
Hence, Store A has $ 1.75 less discounted price than Store B.
Learn more about Percentage here:
https://brainly.com/question/29306119
#SPJ2
How do the expressions 2q^2-3p and 2(p+q)/q Compare when p=8 and q=4?
Answer with a symbol :)
Answers
Answer:
2q^2-3p > 2(p+q)/q
Step-by-step explanation:
You want to compare 2q^2-3p and 2(p+q)/q when (p, q) = (8, 4).
EvaluationTo find the value of the expression, put the numbers in place of the corresponding variables, and do the arithmetic.
2q^2 -3p
2(4)^2 -3(8) = 2(16) -3(8) = 32 -24 = 8
2(p+q)/q2(8+4)/4 = 2(12)/4 = 24/4 = 6
The first expression is greater than (>) the second expression.
64 - 24 - 3
37
what is the answer for 5/11x + 2/3x - 1/6x = -189
Answers
Answer:
x = -198
Step-by-step explanation:
5/11 x + 2/3 x - 1/6 x = -189
66(5/11x + 2/3x - 1/6x) = 66(-189)
30x + 44x - 11x = -12474
63x = -12474
x = -198
Answer:
x = -210
Step-by-step explanation:
[tex]\frac{5}{11x} + \frac{2}{3x} - \frac{1}{6x} = -189[/tex]
[tex]\frac{37}{33x} - \frac{1}{6x} = -189[/tex]
[tex]\frac{21}{22x} = -189[/tex]
0.9x = -189
[tex]x = \frac{-189}{0.9}[/tex]
x = -210