Tom buys a new phone service. it costs $20 to install, and then costs $15 a month. write an equation to show the cost of the phone (y) for any number of months (x). a. y=15x+20 b. y=20x+15 c. y=20x-15 d. 15x+20y=35

At least two people have the same birthday in a school of 150 students

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3