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

Step-by-step 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 $\ 10$