Troy, Rico, and Mario each bought an item at the book store. Troy bought a magazine for 4.99, Rico bought a pocket dictionary for 12.99, and Mario bought a package of notepads for 8.95. What is the average amount that each boy spent?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24