The cost of your new book bag is $11.50 more than the cost c of your old book bag. you pay $47 for your new book bag. write and solve an equation to find the cost of your old book bag. include units in your answer.

Rai compares two cable plans from different companies. which equation gives the correct value of mm, the number of months for which plans a and b cost the same?

Simplify the expression 10/11(22z) + (a+5) -1

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)?