Lesson 18

The value of \(x\) is \(\frac {\text{-}1}{4}\). Order these expressions from least to greatest:

Here are four expressions that have the value \(\frac {\text{-}1}{2}\):

Write five expressions: a sum, a difference, a product, a quotient, and one that involves at least two operations that have the value \(\frac {\text{-}3}{4}\).

Find the value of each expression.

1. \(\text-22 + 5\)
2. \(\text-22 -(\text-5)\)
3. \((\text-22) (\text-5)\)
4. \(\text-22 \div 5\)

The price of an ice cream cone is $3.25, but it costs $3.51 with tax. What is the sales tax rate?

Here are 4 points on a coordinate plane.

1. Label each point with its coordinates.
2. Plot a point that is 3 units from point \(K\). Label it \(P\).
3. Plot a point that is 2 units from point \(M\). Label it \(W\).

A furniture store pays a wholesale price for a mattress. Then, the store marks up the retail price to 150% of the wholesale price. Later, they put the mattress on sale for 50% off of the retail price. A customer just bought the mattress on sale and paid $1,200.

1. What was the retail price of the mattress, before the discount?
2. What was the wholesale price, before the markup?