Find the value of 4x^2 - 3x + 5 when x = - 2

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

Timmy is training for a triathlon. For every four minutes spends running, he spends seven minutes biking. How many minutes will Timmy run if he has spent 63 minutes biking

How many times does 0.15 go into 500?

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