Question

the cost c in pounds of hiring a van for the d days is given by the formula c=20+30d work out the cost of hiring the van for 8 days

Answer 1

160 + 240d

Explanation:

The cost of hiring 1 van is c = 20 + 30d

8 vans will cost 8 * c

C = 8 * (20 + 30d)

C = 160 + 240d