If an interior angle of a regular polygon measures 135°, how many sides does the polygon have?

Find the roots of the quadratic equation x2 _ 8x = 9 by completing the square. Show your work.

What is the least common denominator that can be used to x+1 over 8x^2 add 2x-3 over 12x

How do you solve for T in P=IRT. Show step-by-step solution.

What is 20% off $47.99 with 6 % sales tax

6x532 in expanded form

Solve using substitution. 2x-3y x+y=9 just so you know, I know the answer its (3,6). I just need the explanation on how to get that answer using substitution.

A speed boat is traveling at 100 km/hr. How many hours will it take for the boat to cover a distance of 115 km?

A die contains the numbers 1 through 6. David rolls the die 2 times. What is the probability of getting a 3 on the first roll and a 5 on the second roll?

The equation y = 55x + 85 describes the amount of money a plumber charges, where y is the total amount he charges and x is the number of hours he works. The table shows the total amount of money an electrician charges.

The formula C = 2πr relates the radius r of a circle to its circumference C. Solve the formula for r.