Final Exam Review #2

Front

What is the solution to the equation -8x + 3 = 27?

Back

x = -3

Front

If 2 inches on a map equals 50 miles, how many miles does 3.75 inches represent?

Back

93.75 miles

Front

What equation represents the relationship between blue yarn (b) and red yarn (r) if Colleen uses 45 pieces of blue yarn for every 18 pieces of red yarn?

Back

b = 2/5 r

Front

What is the solution to the equation 3x + 8 = 29?

Back

x = 7

Front

What is the solution to the equation y = 16?

Back

y = 16

Front

Define a proportional relationship in mathematics.

Back

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

Front

What is the formula for finding the distance between two points on a map given a scale?

Back

Distance on map (inches) x Scale (miles per inch) = Actual distance (miles).

Front

How do you isolate a variable in an equation?

Back

To isolate a variable, perform inverse operations to both sides of the equation until the variable is alone.

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value(s) of the variable(s) that make the equation true.

Front

What is the first step in solving the equation 3x + 8 = 29?

Back

Subtract 8 from both sides to get 3x = 21.