Answer:
C
Step-by-step explanation:
3(3 + x) = 15 + x
Open bracket
9 + 3x = 15 + x
Collecting like terms
3x - x = 15 - 9
2x = 6
Dividing by 2
x = 6/2
x = 3
Answer:
The first one
Step-by-step explanation:
Answer: 7/25-1/25i
Step-by-step explanation:
Given the following functions below,

Factorising the denominators of both functions,
Factorising the denominator of f(x),

Factorising the denominator of g(x),

Multiplying both functions,
Total hours= 2.2+3.5=5.7
Total earned = 5.7 x $7.50= $42.75