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Elementary and Intermediate Algebra
Mark Dugopolski, Southeastern Louisiana University
Linear Equations in One Variable
Discount, Investment, and Mixture Applications

Warm-Ups



1

If the original price is w and the discount is 8%, then the selling price is w - 0.08w.
A)TRUE
B)FALSE
2

If x is the selling price and the commission is 8% of the selling price, then the commission is 0.08x.
A)TRUE
B)FALSE
3

If you need $40,000 for your house and the agent gets 10% of the selling price, then the agent gets $4000, and the house sells for $44,000.
A)TRUE
B)FALSE
4

If you mix 10 liters of a 20% acid solution with x liters of a 30% acid solution, then the total amount of acid is 2 + 0.3x liters.
A)TRUE
B)FALSE
5

A 10% acid solution mixed with a 14% acid solution results in a 24% acid solution.
A)TRUE
B)FALSE
6

If a TV costs x dollars and sales tax is 5%, then the total bill is 1.05x dollars.
A)TRUE
B)FALSE








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