Why is 15 not a prime number

What is 20 feet to 8 yards in simplest form

A vendor sells hot dogs and bags of potato chips. A customer buys 4 hot dogs and 5 bags of potato chips for $15.50. Another customer buys 3 hot dogs and 2 bags of potato chips for $9.00. Find the cost of each item.

A snail travels at 71 inches per hour. Choose all the metric measures that are faster than 71 inches per hour. A) 125.7 cm per hour B) 180.3 cm per hour C) 186.0 cm per hour D) 71 cm per hour E) 184.0 cm per hour

A piece of plywood 24 inches wide is cut into strips 2 1/2 inches wide. How many strips of this width can be cut?

What is 1 divided by 10 to the zero power? (1/10^0)

What is the factored form of the polynomial? x2 + 9x + 20 (x - 4) (x - 5) (x - 2) (x - 10) (x + 4) (x + 5) (x + 2) (x + 10)

290 pennies are equal to how many dimes

How can I teach surface area better?

What is the pi of S = (Πr^2) + (2Πr) h

If you have 12 friends and make three equal teams, what fraction do you use?