ACT Algebra Math Review

Front

What is the formula to calculate the final price after applying a discount and sales tax?

Back

Final Price = (Original Price - Discount) * (1 + Sales Tax Rate)

Front

How do you calculate a percentage discount on a price?

Back

Percentage Discount = Original Price * (Discount Rate / 100)

Front

What is the value of the expression (2x + y)(2x - y) when x = 4 and y = -5?

Back

39

Front

What is the algebraic expression for 'the sum of n and 9'?

Back

n + 9

Front

How do you find the difference between two algebraic expressions?

Back

Subtract the second expression from the first.

Front

What is the value of 3x² - 2y when x = 3 and y = 5?

Back

3(3)² - 2(5) = 27 - 10 = 17

Front

What does the expression (q + r - s)(r - q) equal when q = -1, r = 4, and s = 7?

Back

18

Front

How do you evaluate an expression with given variable values?

Back

Substitute the values of the variables into the expression and simplify.

Front

What is the difference between an expression and an equation?

Back

An expression is a combination of numbers and variables without an equality sign, while an equation states that two expressions are equal.

Front

What is the formula for calculating the area of a rectangle?

Back

Area = Length * Width