Simplify each expression. 1. -9y + 5 + 3y - 12 + 7y

2. -4 + 8z - 2( 6z + 3)

3. -5(4 - 7a)

Solve each equation.

4. 4x - 12 = 2x

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)