X+y=20 is it linear and is it proportional or nonproportional

1. Suppose a normal distribution has a mean of 12 and a standard deviation of 4. A value of 18 is how many standard deviations away from the mean? A.-2 B.-1.5 C. 1.5 D. 2 2.

3x - x + 3 + x - 5 - x = x + 10

The lead guitarist made a 100 down payment on a new guitar. He will pay the rest in 8 equal installment of 60. How much will the guitar cost in all

A bicycle shop marks down each bicycle's selling price b by 24% for a holiday sale. b. What is a single term expression for the sale price? 6. Jane sells pillows. For a sale, she marks them down 5%. a.

2. A cup of coffee costs $2. If the total cost IS $18, how many cups of coffee were purchased? a. Write an equation: b. What is the constant of proportionality?

Judges in a diving competition gave scores of 9.3,91/2,94/5,9.95 and 91/4. Which two scores were closest to one another

What numbers multiplied equals - 11

What is: 1x10 to the 15th power x 1x10 to the 15th power?

Factor this problem 100p^2+220p+124

If you buy 18 pounds of coffee into 0.25 pounds of bags how many small bags of coffee can the worker make