4/30 Warm-Up Math 8

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is a composite figure?

Back

A composite figure is a shape that is made up of two or more simple shapes.

Front

How do you calculate the area of a composite figure?

Back

Find the area of each simple shape and then sum them up.

Front

What is an integer?

Back

An integer is a whole number that can be positive, negative, or zero.

Front

Which of the following is an integer: \(\pi\), \(\frac{3}{8}\), \(\sqrt{3}\), or \(-\sqrt{49}\)?

Back

\(-\sqrt{49}\) is an integer because it equals -7.

Front

What is a percentage?

Back

A percentage is a fraction expressed as a part of 100.

Front

How do you calculate a percentage discount?

Back

Multiply the original price by the discount percentage and subtract from the original price.

Front

If a coat originally costs $250 and has a 40% discount, what is the sale price?

Back

Sale price = $250 - ($250 × 0.40) = $150.

Front

What does it mean to solve an inequality?

Back

To find the values of the variable that make the inequality true.

Front

What is the solution to the inequality \(-10r - 37 > 3\)?

Back

First, isolate r: \(-10r > 40\) then \(r < -4\).