SOLUTION: Mr. Schwartz builds toy cars. He begins the week with a supply of 85 wheels, and uses 4 wheels for each car he builds. Mr. Schwartz plans to order more wheels once he has fewer tha

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Question 1190731: Mr. Schwartz builds toy cars. He begins the week with a supply of 85 wheels, and uses 4 wheels for each car he builds. Mr. Schwartz plans to order more wheels once he has fewer than 40 wheels left.
The inequality that can be used to find the number of cars, x, Mr. Schwartz builds before he places an order for more wheels is

Found 2 solutions by math_tutor2020, ikleyn:
Answer by math_tutor2020(3817) About Me  (Show Source):
You can put this solution on YOUR website!

x = number of cars
4x = number of wheels used on x number of cars

For instance, if x = 3 cars are built then he needs 4x = 4*3 = 12 wheels.

He starts off with 85 wheels. Building x cars needs 4x wheels, so he'll have 85-4x wheels left over.

This leftover amount must be 40 or larger (or else he'll place an order to get more wheels).

Therefore, we form the inequality 85-4x+%3E=+40 which is the final answer.

Answer by ikleyn(52805) About Me  (Show Source):