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Brilliant_brown [7]
3 years ago
9

The table shows data for a random sample of 20 students out of middle school. Use the sample to draw an inference about each mea

sure. Explain your reasoning.

Mathematics
1 answer:
Grace [21]3 years ago
6 0
Im not sure counfused
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Solve by the linear combination method (with or without multiplication).
Dima020 [189]

The first step is to name the equations to make the process of solving them easy.

6x+7y=-4....(1)\\5x-3y=-21....(2)

The second step is to multiply  each of the equations by the coefficient of the x term in the other equation. In this case, we will multiply equation  (1) by 5 to get equation (3) and then multiply equation (2) by 6 to get equation (4).

-30x-35y=20...(3)\\30x-18y=-126...(4).

The next step is to add equation equation(3) and  (4) together to get equation (5) as shown below;

-53y=-106....(5)\\=> y= 2.

The next step is to take the value of y and substitute it into any of the equations above.  For this solution, I pick equation (1). The work done to solve for x is shown below.;

6x+7y=-4\\=>6x+7(2)=-4\\=>6x=-18\\=>x=-3

The solution for this system of equations is (-3,2)


5 0
3 years ago
I need help finding the value of y
Dahasolnce [82]

Answer:

Value of y be 5

hope it will help you

5 0
3 years ago
You need to buy some chicken for dinner tonight. You found an ad showing that the store across town has it on sale for $3.29 a p
Gekata [30.6K]
It would be smarter to buy it for 3.39 because you will spend money on gas drive Ig to the other store and you will spend more money
7 0
3 years ago
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My'chael has read 120 pages, which is 45% of a book. How many<br> pages are in the book?
Mars2501 [29]

Answer:

266.67

Step-by-step explanation:

120=.45(x)

x=266.67

7 0
3 years ago
An expression is given in the box.
beks73 [17]

Answer:

the question is 9c/3d where c=4 and d=6

9*4/3*6=2

6 0
3 years ago
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