7.1-7.4 Flashcard Review

Front

What is a solution of an equation?

Back

A solution of an equation is a value that makes the equation true when substituted for the variable.

Front

Is z = 8 a solution of the equation 7z = 42?

Back

No, because substituting z = 8 gives 7(8) = 56, which is not equal to 42.

Front

What is the formula to find the area of a rectangle?

Back

Area = length × width.

Front

If the area of a rectangle is 14 ft² and one side is 7 ft, what is the other side?

Back

7x = 14, where x is the unknown side.

Front

What are independent and dependent variables?

Back

Independent variables are those that can be changed or controlled, while dependent variables are those that depend on the independent variable.

Front

In the equation y = 10x + 25, what is the independent variable?

Back

The independent variable is x.

Front

In the equation y = 10x + 25, what is the dependent variable?

Back

The dependent variable is y.

Front

How do you write '5 more than a number x is 20' as an equation?

Back

5 + x = 20.

Front

What is the first step to solve the equation x + 22 = 50?

Back

Subtract 22 from both sides.

Front

What is the solution to the equation x + 22 = 50?

Back

x = 28.