While shopping for clothes, Jaclyn spent 35$ less than 2 times what Curtis spent. Jaclyn spent $21. Write and solve an equation to find how much Curtis spent. let x represent how much Curtis spent.

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.