Final Exam Review #2

Front

Solve for x: -3x + 8 = -1

Back

x = 3

Front

A scuba diver descends to a depth of 18 feet, ascends 7 feet, then descends 18 feet again. What is the final depth?

Back

-29 feet

Front

Joe earns $25 per yard mowed and $100 for babysitting. Write an equation for mowing y yards to earn $3,100.

Back

25y + 100 = 3,100

Front

Solve for x: 4 – 8x = 20

Back

x = -2

Front

Calculate the percent decrease from $84.50 to $50.70.

Back

40% decrease

Front

What is the formula for calculating percent decrease?

Back

Percent Decrease = ((Original Price - Sale Price) / Original Price) * 100

Front

Define a variable in an equation.

Back

A symbol used to represent an unknown value.

Front

What does it mean to solve an equation?

Back

To find the value of the variable that makes the equation true.

Front

What is the first step in solving the equation 25y + 100 = 3,100?

Back

Subtract 100 from both sides.

Front

What is the solution to the equation 4 – 8x = 20?

Back

x = -2