Answer :19
19\
Step-by-step explanation:
Answer:
$51.30
76 decrease 25% =
76 × (1 - 25%) = 76 × (1 - 0.25) = 57
57 decrease 10% =
57 × (1 - 10%) = 57 × (1 - 0.1) = 51.3
question 12 is answer B
question 13 is -8x^3
exponent rule
6+18x
=6(1+3x)
=6×1+6×3x
=6+18x