Tara buys two items that cost d dollars each. She gives the cashier $20. Which expression represents the change she should receive?

20 - 2d

.20 - d

20 + 2d

2d - 20

The perimeter of a triangle is 189 feet. the longest side of the triangle is 36 feet shorter than twice the shortest side. the sum of the lengths of the two shorter sides is 49 feet more than the length of the longest side.

If the mean of the data set is 7 raisins, find the number of raisins in each scoop of Great4U.

Find the perimeter of a triangle that has 3 equals sides each 6 centimeters long

When rope is selling at $.10 a foot, how many feet can you buy for sixty cents?

062478 as a scientific notation

1.) A population of 4,250 blue whale. A random sample of 10 whales shows that 5 of them are infected. How many whales are likely to be infected?

What is the multiplicative inverse of 10/3?

A binomial is multiplied by a third degree trinomial. what degree must be in order for the product to have a degree of 5?

Find the mean (average) the data set below? 2 18 28 5 4' 5'10'20

412.638 in expanded form using decimals