21y+7x=56? what is the value of X

x = 8 - 3y

Step-by-step explanation:

Hope this helps.

the correct answer is a.) bc< mn 5 stars if this you : )

step-by-step explanation:

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2