Math Review - 7th Grade

Front

What is a supplementary angle?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

If an angle measures 39°, what is its supplementary angle?

Back

141°

Front

What is the equation to represent a situation where you have a total amount and you spend part of it?

Back

The equation is typically in the form of: Total Amount = Amount Spent + Remaining Amount.

Front

How do you calculate the sales tax rate?

Back

Sales Tax Rate = (Sales Tax Amount / Original Price) x 100.

Front

If a notebook costs $4.50 and after tax it costs $4.86, what is the sales tax amount?

Back

The sales tax amount is $0.36.

Front

What is the formula to find the age of a person if you know the age difference?

Back

If Jacob is 12 years younger than twice Elizabeth’s age, the formula is: Jacob's Age = 2 * Elizabeth's Age - 12.

Front

How many cups of flour are needed for 10 dozen muffins if 1.25 cups are needed for 2.5 dozen?

Back

5 cups.

Front

What does it mean to solve for a variable in an equation?

Back

To solve for a variable means to isolate the variable on one side of the equation to find its value.

Front

What is the first step in solving the equation 2r + 15 = 25?

Back

Subtract 15 from both sides to isolate the term with the variable.

Front

What is the definition of a variable in mathematics?

Back

A variable is a symbol used to represent an unknown value in mathematical expressions or equations.