Which of these is an example of a literal equation?
o a. ax - by=k
o b. 4x+ 7 = 22
o c. 2x+7y
o d. 5 + 20 = 52

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

Complete the equation of the live through (-1,6) (7,-2)