Answer:
Step-by-step explanation:
⇒ 
⇒ 
⇒ 
Let’s make an equation
Let’s say x = amount of years after
Smith = 8, mother = 42
3(8 + x) = 42 + x
24 + 3x = 42 + x
2x = 18, x = 9
Solution: after 9 years
Answer:
charge for d days=d×75$
charge for k kilometers=k×65cents
total cost=75d$+k×0.65$
c=(75d+0.65k)$
I'm pretty sure the answer is D bc it has the same coefficients and the same numbers
