Question

A pencil costs $p$ dollars and an eraser costs $e$ dollars. Mark buys $3$ more pencils than erasers, and he buys $7$ pencils. Write an expression that represents the amount of money that Mark spent, in dollars.

Answer 1

`$\boxed{7p+4e}$`

Explanation:

Mark buys 7 pencils, and a pencil costs p dollars, so the total cost of all of the pencils is 7p dollars. He buys 3 more pencils than erasers, so he buys 4 erasers. Each eraser costs e dollars, so the total cost of all the erasers is 4e dollars. Thus, Mark spent
`$\boxed{7p+4e}$` dollars in total.

Hope this helped! :)

Answer 2

7p + 4e

Explanation:

If Mark bought 7 pencils, and three more pencils than erasers, then he bought 4 erasers (7 - 3 = 4) . If each pencil costs p dollars and each eraser costs e dollars, the total amount of money spent by Mark (M) is given by:

`M=7*p+4*e`

The expression is M = 7p + 4e.