Question

ali buys 10 burgers and 7 chocolate milkshakes for her group of friends for 50.95. If the price of a chocolate milkshake is 0.25 cheaper than the price of a burger,ehat is the price of a chocolate milkshake?

Answer 1

The milkshake costs $2.85

Explanation:

b = price of a burger

m = price of a milkshake

We know that
`10b+7m=50.95\\`. We also know that
`m+0.25 =b`.

So, let's substitute!

`10(m+0.25)+7m=50.95\\10m+2.5+7m=50.95\\17m+2.5-2.5=50.95-2.5\\17m=48.45\\m=(48.45)/(17)\\m=2.85\\`

The milkshake costs $2.85