keyonnaallen2004
21.02.2021 •
Mathematics
Which equation represents a proportional relationship? A y=x+13y=x+\frac{1}{3}y=x+ 3 1 B y=1−13xy=1-\frac{1}{3}xy=1− 3 1 x C y=3x+13y=3x+\frac{1}{3}y=3x+ 3 1 D y=13xy=\frac{1}{3}xy= 3 1 x
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Ответ:
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Ответ:
Yes, it is a solution
Step-by-step explanation:
9x+7y=-11
-2x-5y=30
substitute 5 for x and -8 for y and test:
9(5)+7(-8)=-11
45-56=-11 , this is true
-2(5)-5(-8)=30
-10+40=30 , this is true also