Question

What would be the first step to eliminate the x variable in this system using addition?

{2x+4y=10
{x -3y=12


a. Multiply the bottom equation by 1/2


b. Multiply the top equation by 3


c. Multiply the bottom equation by 4


d. Multiply the bottom equation by -2

Answer 1

d. is your best choice

Answer 2

im sorry but are you sure?

Answer 3

Yup

Answer 4

ok thank you do you mind helping me again???

Answer 5

Shoot on! (:

Answer 6

Devin spent a total of $64 dollars for shoes and a hat. The shoes cost $6 more than the hat. How much did the shoes cost? Let shoes be represented by x and hats be represented by y.


A. $38


B. $26


C. $35


D. $29


2. Which of the following would have a dotted boundary line and have a graph in which the area above the line is shaded?


A. y > -2x - 8


B. y ≥ 7x - 10


C. y < 4x + 5


D. y < -1/2x - 9

Answer 7

For Q. 1

Let the cost for the hat be y
Cost of shoes is x=6+y
So put all together now

\[6 + y + y = 64 \rightarrow 2y = 58 \rightarrow y = 26\]