How do i know when a set of ordered pairs that represents a function?

The sales tax on a $20 hammer is 7 percent, or $1.40. why is this tax a bigger burden for josh, who has a $15,000 income, than for aaron, who has a $150,000 income?

From the 10 male and 8 female sales representatives for an insurance company, a team of 4 men and 3 women will be selected to attend a national conference on insurance fraud. In how many ways can the team of 7 be selected

How many hours are in 1/4+3/5

Complete the equation:1 (2/3) mi = how many ft.

Which of the following expressions is equivalent to the logarithmic expression below? log4 7/x^3

Every cupcake Jake bakes weighs 0.45 pounds how much will a box of 100 Cupcakes weigh

The surface area of the given cube is 150 square feet. a) 5 cubic feet b) 25 cubic feet c) 125 cubic feet d) 625 cubic feet

If x=7+root 40, find the value of root x+1by the root of x

The last time andy went bowling he had a mean score of 158 per game. After 3 games Andy has a total score of 473 He thinks he needs to score over 160 in game 4 to get a mean score greater than 158. Is he correct? Show a check of working

8*{[ (7+4*2-[ (11-7) * 4]}