Rafael took piano lessons for 3.5 years. Then he took violin lessons for the next 2.8 years.

How many years has Rafael taken music lessons?

Find the greatest common factor of the following monomials: 26n^5 12n^2

5^3 x 4^5 45 4000 128000 56

Which of the following values in the set below will make the equation 2x + 1 = 3 true? (Only input the number.) {0, 1, 2, 3, 4}

Andy and Ben both worked a total of 88 hours one week. Ben worked 8 hours more than Andy. Find the number of hours each man worked.

What's - 1,099 squared to the 2 power

A cone has a height of 2.5 in. and a radius of 5 in. What is the volume of the cone? (Use 3.14 for pi. Round the answer to two decimal places.) 32.71 in3 65.42 in3 196.25 in3 588.75 in3

This is how we know were in a pandemic. When the BMX bike company starts selling toilet paper for $7.

If p, q are zeroes of polynomial f (x) = 2x^2-7x+3, find the value of p^2+q^2

Suppose $x$,$y$, and $z$ form a geometric sequence. if you know that $x+y+z=18$ and $x^2+y^2+z^2=612$, find the value of $y$.

A manager checked production records and found that a worker produced 160 units while working 40 hours. In the previous week, the same worker produced 138 units while working 36 hours.