On a number line, a number, b, is located the same distance from 0 as another number, a, but in the opposite direction. The number b varies directly with the number a. For example b= 2; when a = -2.Which equation represents this
direct variation between a and b?
b = -a
-b = -a
b-a = 0
Ob(-a) = 0

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?