Question

(50 points, Math) TechWiz Electronics makes a profit of $35

for each MP3 player sold and $18
for each DVD player sold. Last week, TechWiz sold a combined total of 121
MP3 and DVD players. Let x
be the number of MP3 players TechWiz sold last week. Write an expression for the combined total profit (in dollars) TechWiz made from MP3 and DVD players last week

Answer 1

The total profit TechWiz made from MP3 and DVD players last week is
`$17 x+2178$`

Step-by-step explanation:

Let x represent the number of MP3 players TechWiz sold last week.

Let y represent the number of DVD players TechWiz sold last week.

The profit made by TechWiz on each MP3 player = $35

The profit made by TechWiz on each DVD player = $18

Total number of MP3 and DVD players TechWiz sold last week is 121

Number of DVD players TechWiz sold last week
`y = 121 - x`

The total profit TechWiz made from MP3 and DVD players last week is given by

`35x+18y`

Substituting
`y = 121 - x` in
`35x+18y`, we get,

`35x+18(121-x)`

Simplifying, we get,

`35x+2178-18x\\17x+2178`

Thus, the total profit TechWiz made from MP3 and DVD players last week is
`$17 x+2178$`