The Venn diagram shows the number of students playing instruments. How many students play either the guitar or tuba?

A) 7
B) 8
C) 15
D) 80

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Twelve less than a number is at most 20

Tessa bought stock in a restaurant for $253.00. her stock is now worth $333.96. what is the percentage increase of the value of tessa's stock? a.) 81% b.) 32% c.) 24% d.) 76%