How many different selections of 4 books can be made from a bookcase displaying 12 books?

Which of the following could not be the lengths of the sides of a right triangle? A. 9ft, 12 ft, 15ft B. 5in, 10in, 15in C. 4cm, 7.5, 8.5cm D. 1.5m, 2m, 2.5

Is 20/30 equivalent to 2/3

Reese is selling lemonade at the parade. He gets to keep 50% of the money he collects. A large lemonade is $7.00 and a small lemonade is $3.00.

Simplify the following expression by distributing: 4 (3-x) - 2=

Calculate each sum 2and3/8 + 5 and 1/4=

The actual distance between two villages is 120 kilometers. On a map of the area, 0.5 centimeter represents 2 kilometers. What is the distance between the villages on the map?

You buy 5 tickets to a concert for you and your friends. You pay $170, including a $20 service charge. How much does one ticket cost?

What is 1.2 % of 0.5?

Jeff can win the game if he rolls 11 on the two number cubes. If he rolls an even sum, however, he will lose his next turn. What is the probability that he will win the game? What is the probability that he will lose his next turn?

Suppose 60 cars start at a car race. in how many ways can the top 3 cars finish the race?