Answer:
The answer would be
0-9 =2
10 - 19 = 5
20 - 29 = 2
30 - 39 = 0
Step-by-step explanation:
36 tens. I think.
66-30=36
$7.20
c =
To make a perfect square
add ( half the coefficient of the x- term )² to x² + 5x
x² + 5x + ( )²
= x² + 5x +
= (x + )² ← a perfect square
.180
use a calculater