3/4+3=21 how?? Please

False! The left side 3.75 does not equal to the right side 21, which means that the given statement is false.

Step-by-step explanation:

15/4 = 21

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