Simplify the equation: z^2 - z (z+3) + 3z

The amount of chlorine in a swimming pool varies directly with the volume of water. the pool has 2.5 milligrams of chlorine per liter of water. there are 8000 gallons of water in the swimming pool.

Solve x^3+3x^2+25-75=0

A tree casts a shadow of 28 feet. At the same time, a biologist who is 7 feet tall casts a shadow of 2 feet. How tall is the tree? 8 feet 14 feet 78 feet 98 feet

Is 7/0 an irrational, rational, or not a real number

Choose the correct product of (2x - 4) 2. 4x2 - 16 4x2 - 16x + 16 4x2 + 16 4x2 + 16x + 16

28 is what percent of 50?

Mary has a collection of nickels and quarters for a total value of $4.90. If she has 42 coins total, how many of each kind are there?

3y to the power of 2 + 6y+2y

The exact number of kilometers in m miles is f (m), where f is the function defined by f (m) = 1.609344m. (a) find a formula for f-1 (k). (b) what is the meaning of f-1 (k) ?

How do you find lateral area of a rectagular prism?