Problema Solution
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 109 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 provided by our tutors
Let
x be the number of MP3 players TechWiz sold last week
y be the number of DVD players TechWiz sold last week
TechWiz sold a combined total of 109 MP3 and DVD players
x + y = 109
y = 109 - x
the profit in dollars will be 35x + 18y = 35x + 18(109 - x) = 1962 + 17x thus
1962 + 17x is the expression for the combined total profit (in dollars) TechWiz made from MP3 and DVD players last week.