Ch. 1-4, 6 Review

Front

What is a function in mathematics?

Back

A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.

Front

Identify a set of values that represents a function: (9,5) (10,5) (9,-5) (10,-5), (3,4) (4,-3) (7,4) (3, 8), (6,-5) (7, -3) (8, -1) (9, 1), (2, -2) (5, 9) (5, -7) (1, 4)

Back

(6,-5) (7, -3) (8, -1) (9, 1) is a function because no x-value is repeated.

Front

How do you calculate the perimeter of a square?

Back

The perimeter of a square is calculated by adding all four sides or using the formula P = 4s, where s is the length of one side.

Front

If a square picture frame has an area of 25 sq inches, what is the length of one side?

Back

The length of one side is 5 inches, since area = side², thus side = √25 = 5.

Front

What is the formula to calculate simple interest?

Back

Simple Interest = Principal × Rate × Time.

Front

If Josh borrows $7000 and repays $9187.50 in 5 years, what is the interest rate?

Back

The interest rate is 6.25%.

Front

How do you subtract mixed numbers?

Back

Convert mixed numbers to improper fractions, find a common denominator, subtract, and convert back to a mixed number if necessary.

Front

Calculate: 8 1/5 - 3 2/3

Back

4 8/15.

Front

What is the quotient rule in exponents?

Back

The quotient rule states that when dividing two powers with the same base, subtract the exponents: a^m / a^n = a^(m-n).

Front

Evaluate: 9^9 / 9^4 using the quotient rule.

Back

9^5.