Unit 3 Test Recovery

Front

What is the formula to calculate a tip based on a percentage?

Back

Tip = Bill Amount × Tip Percentage

Front

How do you solve the equation 2x - 6 + 7x + 4 = 180?

Back

Combine like terms: 9x - 2 = 180; then add 2 to both sides and divide by 9.

Front

If 13 out of 20 homes have a personal computer, how do you find the expected number of computers on a street with 60 homes?

Back

Use the ratio: (13/20) × 60 = 39 computers.

Front

What is a supplement angle?

Back

A supplement angle is an angle that, when added to a given angle, equals 180°.

Front

What is the supplement angle to 42°?

Back

The supplement angle is 138° (180° - 42°).

Front

What is a complement angle?

Back

A complement angle is an angle that, when added to a given angle, equals 90°.

Front

What is the complement angle to 30°?

Back

The complement angle is 60° (90° - 30°).

Front

How do you convert a percentage to a decimal?

Back

Divide the percentage by 100.

Front

What is the first step in solving a linear equation?

Back

Isolate the variable on one side of the equation.

Front

What does it mean to combine like terms in an equation?

Back

It means to add or subtract terms that have the same variable raised to the same power.