Alexis bought x boxes of cereal for $3 each, including tax, and paid with a $20 bill. Which expression represents the total amount of change she should receive? pick one of the following

20 - 3x

(3 - 20) x

3x - 20

(20 - 3) x

A textbook store sold a combined total of 312 history and psychology textbooks in a week. The number of psychology textbooks sold was 84 less than the number of history textbooks sold. How many textbooks of each type were sold?

8 1/4 as an improper fraction.

What is the third term of (2x-1) ^5

2 (x + 3) + 8 + 5 (x - 2) + 4x + 3 This problem simplified would be:

What is the best name of the solid that can be formed by this net? A prism is made up of 3 rectangles and 2 triangles. rectangular pyramid tetrahedron rectangular prism triangular prism

In an experiment, each of two people has six cards labled 1 through 6. the first person chooses a card from set one, while the second person chooses a card from set two. what is the probability that the two people will choose the same card

The base of a right pyramid is a regular hexagon with sides of length 1212 m. the altitude is 66 m. find the total surface area of the pyramid.

What is - 4 (2n-3) = 12-8n

Find the greatest possible pair of numbers such that one integer is 5 more than twice the other and the sum is less than 30.

My friend just asked me this; how to solve 25% of 60kg?