You have 17 coins. they are pennies and quarters. they amount to $3.53. write and solve a syste of equations to determine how many pennies and quarters you have.

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Which of the following exponential functions goes through the points (1, 6) and (2, 12)? f(x) = 3(2)x f(x) = 2(3)x f(x) = 3(2)−x f(x) = 2(3)−x

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2