7th grade First Semester Review

Front

What are supplementary angles?

Back

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

Front

If a puppy's weight increases from 40 to 50 pounds, what is the percent increase?

Back

The percent increase is calculated as ((new weight - old weight) / old weight) * 100. In this case, ((50 - 40) / 40) * 100 = 25%.

Front

Solve for x: 2x + 3 = 13

Back

x = 5.

Front

What is 20% of 120?

Back

20% of 120 is 24.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the ratio between two proportional quantities, often represented as k in the equation y = kx.

Front

What is the formula for calculating percent increase?

Back

Percent Increase = ((New Value - Old Value) / Old Value) * 100.

Front

What is the sum of angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.

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.

Front

What does it mean for two quantities to be proportional?

Back

Two quantities are proportional if they maintain a constant ratio to each other.

Front

How do you find the area of a rectangle?

Back

The area of a rectangle is found by multiplying its length by its width (Area = length × width).