6 balloons.............23,94
1 balloon...................x
x=23,94:6
x=$3,99
Step-by-step explanation:
For the first one for A, B, C its the explanation in the left corner
Multiply the bottom together to get 8 and the top is now 5x
Value of x is 9
As when we multiply a + 3 by -2a2 + 15a + 6
We get
(a + 3) (-2a2 + 15a + 6)
-2a3 + 15a2 + 6a - 6a2 + 45a + 18
-2a3 + 9a2 + 51a + 18
If we compare the coefficients of a2, we get
x = 9
