Explain why a change from 20 to 40 is a 100% increase but a change from 40 to 20 is a 50% decrease.

Explain the difference between x-2 and 2-x?

The speed of light is 3.0*10^8 m/s. Red light has a wavelength of 7 * 10^-7 m. What is its frequency?

What is the factored form of this expression? x2 - 121 Fill in the values for p and q to complete the factored form of the expression.

The LCM of 3 and 7 is

Five times the sum of a number and seven is thirty. find the number.

The 70-foot rope was cut into two pieces. One of these pieces was 10 feet longer than three times the length of the other piece. How long was each piece

Find the exact value of sin-1-32

Margo can purchase tile at a store for $0.69 per tile and rent a tile saw for $32. At another store she can borrow the tile saw for free if she buys tiles there for $1.49 per tile.

Fannie Flynn compares her checkbook register, cancelled checks, and bank statement which shows a balance of $300.42. She finds two outstanding checks for $98.25 and $59.35. There is also an outstanding deposit of $19.95.

The dance teacher bought a roll of ribbon that is 201.5 yards. She needs 15.5 yards of ribbon for each dancer. How many 15.5 yards pieces of ribbon can they cut from each roll on ribbon