Ewan and Karlos play an online game that has a cost per minute as well as an initial set-up fee. So far, Ewan has
played for 510 minutes and was charged a total of $17.80, Karlos has logged an impressive 682 minutes of
playing time and has spent $22.96.

Set-up fee =$2.50

Minute rate=$0.03

Step-by-step explanation:

let x be the set-up fee and y the rate per minute.

-The individuals costs can be expressed as:

We make  subtract Ewan's equation for Karlos:

The rate per minute played is $0.03

=>We substitute the minute rate in Ewan's equation to solve for x:

Hence, the set-up fee is $2.5

i think 1: 2

step-by-step explanation:

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls