Simplify the expression.

-7a + 2x + 5a - 6x

A) - 12a - 8x

B) - 12a - 4x

C) - 2a - 4x

D) - 2a - 8x

Why does a bag of chips puff up in an airplane?

Dora the Explora travelled 10 miles in 5 minutes. How fast was she going (in MPH) ?

A customer left an 18% gratuity of $27. What was the amount of the bill?

Redwood National Park in California has an area of 112,512 acres. Voyageurs National Park in Minnesota has an area of 218,200 acres. What is the area of the two national parks altogether? Jesse solved this problem. He said the area was 330,712 acres.

List an appropriate SI base unit (with a prefix as needed) for measuring the following: the mass of a single slice of pepperoni.

Identify which type of sampling is used: random, systematic, convenience, stratified, or cluster. Upper A magazine asks its readers to call in their opinion regarding the quality of the articles.

A liquid that has components that can be distinguished from each other is a compound. atom. element. mixture.

What's the sum of 2⁄5 and 2⁄4?

A cd and a DVD have the same diameter. Explain why they have the same circumference

567.657 the 5 in the hundredth place is? The 5 in the hundreds place