If a and b are two rational numbers, which expressions are equivalent to a-b? Mark all that apply.

A. a-|-b|, if b>0.

B. a+|-b|, if b>0.

C. a + (-b), if b>0.

D. a-|-b|, if b<0.

E. a+|-b|, if b<0.

F. a + (-b), if b<0

A hill frequently used for sled riding has an angle of elevation of 25 degrees at it's bottom. If the length of a sledders ride is 52 ft, estimate the height of the hill.

In a fish bowl there were 12 fish, some little, others big. if each of the big fish ate 2 little fish and then the little fish were all gone, how many fish are left in the bowl?

There are 10 students in a class. The teacher chooses 2 students to go to the library. The order in which they are chosen does not matter. How many ways are there to choose the students?

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? The molecules move more quickly and their average kinetic energy increases.

What is 108 divided by 9

What's the simplest form of the fraction 85 over 204

What is - |2x-6| greater than 8

Write the fracions in order from least to greatest 4/6 7/12 5/10

What is the place value of the diget 6 in the decomal number 4.769

What are the solutions to 4 (x-3) ² = 64?