Tom bought n DVDs for a total cost of 15n - 2 dollars. Which expression represents the cost of each DVD?

a. n (15·n - 2)

b. n + (15·n - 2)

c. (15·n - 2) / n

d. (15·n - 2) - n

The least common multiple of two numbers is 60, and one of the numbers is 7 less the other number. What are the numbers?

What is the net force on this object? Small box with dot in the middle. Arrows originate at dot. Arrow up and Arrow down are same length. Arrow up labeled F sub norm equals 20 N and Arrow down labeled F sub grav equals 20 N.

The length of a rectangle is seven less than twice the length of its width. If the area of the rectangle is 15 square meters, find the value of x.

The average age of the residents in a city is 40 and the standard deviation is 17 years. The distribution of ages is known to be normal. Suppose a group of 15 people is formed to represent all age groups. The average age of this group is 50.

Using the follow arithmetic sequence, find the 29th term : - 36, - 32, - 28, - 24

Joan spend half of her paycheck going to the movies. She washed the family car and earned 7 dollars. What is her weekly paycheck if she ended up with 18 dollars?

Which of these sets of numbers contain all rational numbers? A. π, 1/2, - 13 B. - 3.0541 ...,√99, 0.14363 C. - 6, - √225, 4 7/8 D. √21, 0.75, 0

A paint store mixed 4 3/4 cans of paint and 7 2/3 cans of white paint did this mixture make?

One number is 2 more than another. The difference between their squares is 20. What are the numbers?

M + 5/6 = 11/12 What is m? s - 1/9 = 5/18 What is s?