Find the value of the coefficient a in the equation ax+2y=8, if the solution to the equation is the pair x=2 and y=1. HELP PLS

a= 3

Step-by-step explanation:

put the values of x and y in the equation and solve it

don't report but were is the digram

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