Question

For his birthday, Mr. Robin and four of his friends went to a Math museum to learn about new intergalactic math. They each got a ticket for $12.00 and each bought the same calculator at the gift shop. If Mr. Robin spent $110 for the group's tickets and calculator, how much did each calculator cost? Write and solve an equation to describe this situation.

Answer 1

Answer: $10

Explanation:

Given

Robin and his four friends bought tickets for
`\$12` each

If each one of them bought a calculator then the total spendings are
`\$110`

Suppose the cost of each calculator is
`\$\ x`

Cost per person is given by
`x+\$12`

For the group, it is
`5(x+12)`

Equate this to total spendings

`\Rightarrow 5(x+12)=110\\\Rightarrow x+12=22\\\Rightarrow x=\$\ 10`

thus, the cost of each calculator is
`\$ 10`