What is the answer to 2.5d + 7.5 = 20

The parabola opens: y=√x-4 (principal square root) up down right left

The graph of y=x3 is transformed as shown in the graph below. which equation represents the transformed function?

Afamily has two cars. the first car has a fuel efficiency of 25 miles per gallon of gas and the second has a fuel efficiency of 15 miles per gallon of gas. during one particular week, the two cars went a combined total of 1025 miles, for a total gas consumption of 55 gallons. how many gallons were consumed by each of the two cars that week?