Question

rtyry

Answer 1

D

Answer 2

- 5x - 2y + 10x + 4y = - 7 + 14
2y = 7 - 5x
y = 3.5 - 2.5x

5x + 2(3.5 - 2.5x) = 7
5x + 7 - 5x = 7
0 = 0

Answer: infinitely many solutions

Answer 3

5x + 2y = 7 ----- times 2
10x + 4y = 14

10x + 4y = 14
10x + 4y = 14
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this equations are the same, therefore you can't solve it, since you have only one equation and two variables.

Answer 4

so it is D, because any number of solutions would fit as long as x varies indirectly to y