OST Test Review

Front

What is the constant of proportionality?

Back

The constant of proportionality is the ratio between two quantities that are directly proportional to each other. It can be represented in an equation as y = kx, where k is the constant.

Front

Write an equation to represent a proportional relationship where the constant of proportionality is 1.75.

Back

cost = 1.75 × pounds.

Front

How do you calculate interest on a loan?

Back

Interest can be calculated using the formula: Interest = Principal × Rate × Time.

Front

If Freida borrows $4,200 at a 5% interest rate for one year, how much interest will she pay?

Back

$210.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to combine like terms and reduce it to its simplest form.

Front

Simplify the expression: 3(-4x + 6) - 5(2x + 1)

Back

-22x + 13.

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac, allowing you to multiply a single term by two or more terms inside a set of parentheses.

Front

Simplify the expression: 2(4x + 1) + 5(7x + 3)

Back

39x + 17.

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where their ratio remains constant.

Front

Write an equation to represent a proportional relationship where the constant of proportionality is 3.5.

Back

feet = 3.5 × minutes.