Sam is 3 years younger than marco. marco is 15 years old. how old is sam?
let x represent sam's age
(there are 2 correct answers)

x + 15 = 3

x + 3 = 15

15 / x = 3 < < the slash is divided

3 x = 15

15 - x = 3

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

Kathy spent 5/8 of her money on books and another 1/6 of her money on stationeries. what fraction of kathy’s money was left?

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%