What should I make sure to remember about a variable with no coefficient?

The freshman class has 160 students. Each freshman must write 3 reports from a list of 10 novels that the teacher has assigned them to read. How many different combinations of novels can a freshman student choose to write reports on?

3 - 2 (2x - 3) = 17 solving for a variable

The area of a rectangular playground enclosure at francis lewis hw is 500 square meters. the lenght of the playground is 5 meters longer than the width. find the dimension of the playground, in meters.

High Flying Airlines charges $20 to check a piece of luggage up to 40 pounds. Each additional pound over 40 pounds costs $0.25. The maximum weight for a piece of checked luggage is 80 pounds. Write a function to represent the situation.

6 divided 2 (1+2) and 9 - 3 divided by 1/3 + 1

Volunteers were 3/4 finished with the walkathon when they reached the 4 1/2 kilometer mark how long was the walkathon

A six-sided die (with numbers 1 through 6) and an eight-sided die (with numbers 1 through 8) are rolled. what is the probability that there is exactly one 6 showing? express your answer as a common fraction

A book store was sling 2 books for 15.86 online you could buy 7 books for 55.93 which place has a lower price

Round 48,382 to the nearest 100: 1,000: 10,000:

The ratio of boys to girls in a class is 4:3. There are 35 students in the class. How many more boys than girls are there?