When looking at an equation how do you know if it is a function?

What is mean of 7,9,4,4,7,9,6,4,

A model airplane flies 18 feet in 2 seconds. What is the airplanes speed in miles per hour?

Penelope and John are workers in a factory making widgets. Penelope can make 30 widgets per day in the factory. Penelope is able to produce 50% more widgets per day than John. How many widgets can John make per day?

Bert's cab company charges $1.00 plus an additional $3.00 per mile for a ride. Madeline's cab company charges $3.00 plus an additional $2.

Toby, a toy store buyer, ordered 2 gross rubber spiders, 60 teddy bears, and 5 dozen video games. The spiders cost 7 cents each, the bears cost 59.76 dollars per dozen, and the video games were on sale for a special price-12 for 156 dollars.

Why does 0.50 m equal to 50 cm?

Find the volume of a cone with a base diameter of 12in and a height of 9in. write the exact volume in terms of π, and be sure to include the correct unit in your answer.

To improve his basketball skills, Troy decides to practice six times as many free throws and four times as many jump shots every day.

x^2 + 2x + 3 find the indicated output for this function

A pair of fair dice is tossed. events a and b are defined as follows. a.{the two numbers rolled are different} b.{at least one of the numbers is greater than 2} are the events a and b mutually exclusive? explain