Unit 11 Test Review 7R

Front

What is the equation for 'Three times a number decreased by four is equal to the number increased by five'?

Back

3x - 4 = x + 5

Front

If the perimeter of a rectangle is 88, how do you find the length of the short side?

Back

Use the perimeter formula: P = 2(length + width).

Front

Back

-9

Front

How do you find the area of a rectangle if the area is given as 84 yards²?

Back

Set up the equation: 7(4x + 5) = 84.

Front

What does it mean to expand an expression like 4y²?

Back

It means to write it as a product: 4 • y • y.

Front

What is the formula for the perimeter of a rectangle?

Back

P = 2(length + width).

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign, while an equation does.

Front

How do you solve for x in the equation 3x - 4 = x + 5?

Back

Isolate x by moving terms involving x to one side and constants to the other.

Front

What is the area of a rectangle with length 7 and width 4x + 5?

Back

Area = length × width = 7(4x + 5).

Front

What does it mean to 'decrease by' in a mathematical context?

Back

To decrease by means to subtract a value from another.