Question

On At a snack bar, each medium drink costs $1.85 andeach large drink costs c more dollars than a mediumdrink. If 5 medium drinks and 5 large drinks cost atotal of $20.50, what is the value of c ?A) 0.45B) 0.40C) 0.30D) 0.25UniM esimi ornit2S-a anoita90D. 6 LỚP2196216 TUOY 16M

Answer 1

If x is the value of the large drink, then:

`x=1.85+c\text{.}`

With the given information we can set the following equation:

`5\cdot1.85+5x=20.50.`

Substituting the first equation on the board in the above equation we get:

`5\cdot1.85+5(1.85+c)=20.50.`

Solving for c we get:

`\begin{gathered} 9.25+9.25+5c=20.50, \\ 5c=20.50-18.50, \\ c=(2.00)/(5)=0.40. \end{gathered}`

Answer: Option B.