Is the set closed or not closed under operation? Negative Integers under multiplication

Find the perimeter of a triangle with sides that measure 2 1/2 ft, 20 in, and 1/2 yd. Answer in inches.

Express 0.1588 in scientific notation

Following a 5% sale discount, the price of an item changed to $38.00. What was the original price of the item?

278 megabytes is being downloaded. 12.9 is complete. how many have been downloaded, round to nearest tenth.

X + x + 3y how do I simplify?

The cost of a circus ticket is $8. There are y people in a group who want to go to the circus. Which of the following expressions describes the total amount of money the group will need to go to the circus? 8 - y (8) (2) y + 8 8y

Solids X and Y are similar. X has volume of 64 cm3 Y has volume of 729 cm3 The surface area of X is 208 cm2 Work out the surface area of Y.

Which is greater 1.25 or 12.5

I know the 90 percent number so how do i find the 100 perent number

The sum of three consecutive numbers is 414. What is the 2nd number?