Evaluate expression: evaluate each expression when a = "-2" b=4 and c=-10 2a+b

ac-b

a+b/a

8a+5b

-4a-b

3c/-5

13 is the same as 1÷3. what is the exact quotient in decimal form of 1÷3?

Carmen and matt are conducting different chemistry experiments in school. in both experiments, each student starts with an initial amount of water in a flask. they combine two chemicals which react to produce more water. carmen's experiment starts with 30 milliliters of water in a flask, and the water increases in volume by 8.5 milliliters per second. matt's experiment starts with 10 milliliters of water and increases in volume by 28% each second.

The table below shows the number of color pages a printer prints out over a period of time. printed pages in color time (min), x 2 6 8 18 number of pages, y 3 9 12 27 what is the constant of variation?