Extra Review for Topics 3 & 5 Test - PreAlgebra

Front

Solve the equation: 3.5x + 1.5x = 10

Back

x = 2

Front

Write an equation that represents the following description: Ten more than three times a number equals twenty-five.

Back

3x + 10 = 25

Front

Solve the equation: 0.5(10 + y) = 15

Back

y = 20

Front

The graph of a proportional relationship __________ through the point (0,0).

Back

passes

Front

Sarah hired a plumber to fix her sink. The equation y = 60x + 80 represents the total cost in dollars, y, of hiring the plumber for x hours. What is the hourly rate of the plumber?

Back

$60

Front

What is the definition of a variable in algebra?

Back

A symbol used to represent an unknown value.

Front

What does it mean for two quantities to be proportional?

Back

They have a constant ratio or relationship.

Front

What is the formula for finding the slope of a line?

Back

Slope (m) = (y2 - y1) / (x2 - x1) for two points (x1, y1) and (x2, y2).

Front

What is the distributive property?

Back

a(b + c) = ab + ac.

Front

What is an equation?

Back

A mathematical statement that asserts the equality of two expressions.