Published 11.05.2018 on subject Mathematics by Guest

A weightlifter uses 45 pound plates and 10 pound plates to lift 260 pounds .let x represent the number of 45 pounf weights and y represents the number of 10 pound weights .

part 1 Rights an equation is standard form that represents the situation.

part 2. if the weightlifter uses eight 10 pound weights, how many 45 pound weights did he use???????

Answered by Guest

Part 1.
The total weight is given by ...
  45x +10y = 260


Part 2.
The solution to the equation when y=8 is
  45x +10*8 = 260
  45x = 180
  x = 180/45 = 4
The weightlifter used 4 45-pound weights.