A model builder has 30 pieces of balsa wood in a box. Four pieces are 15 inches long, 10 pieces are 12 inches long, and the rest are 8 inches long. What is the probability the builder will pull an 8-inch piece from the box without looking?

Find the difference. (4-5y) - 2 (3.5y-8)

Paula invests £4500 in a savings account that pays n% simple interest per annum. At the end of six years their is £5025 in the account. Find the value of n

Which of the following sets could be represented by the given Venn diagram? S = {multiples of 4} T = {8, 12, 20} S = {Mercury, Venus, Earth, Mars} T = {planets in our solar system} S = {reptiles} T = {mammals} S = {prime numbers less than 10} T =

How many shelves will display 2 cars if 8 of the shelves each display 1 car

Michael puts 21 sports cards into stacks of 3. The answer is 7. What's the question?

Name the multiplication property shown the equation 12 times m = m times 12

Using the results from the table, predict the number of times a 3 would be rolled in 400 trials. Number Rolled 1 2 3 4 5 6 Number of Rolls 13 12 12 14 11 18

A bag contains 4 blue marbles, 6 green marbles, and 2 red marbles. You select one green marble from the full bag. What is the probability that the next marble you select will be blue?

Y=-3x+4; x=2y+6 solve by substitution

An Air Force intercept squadron consists of 16 planes that should always be ready for immediate launch. However, there is a probability of 0.25 that the engines of a particular plane will not start at a given attempt.