There are 13 students in a biology class and 12 students in a chemistry class. if there are 20 students in total, how many students are in both classes?

Solve this equation. 28 - k = 22 k =

For each planet in the solar system it's year is the time it takes a planet to revolve around the center start. The formula E (x) = 0.

What is 11295 rounded to the nearest ten thousand

F (x) = - 2 (3) ^-1 how do I solve this?

Which model represent the factors of 4x^2-9

The table shows the elevation in feet that a hiker has yet to climb before reaching the peak in terms of the number hours hiked. x y 2 1,400 4 1,000

Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. a pollster contacts 92 people in the 18-21 age bracket and finds that 78 of them respond and 14 refuse to respond.

Compare the algebraically expressed function f (x) = 3x2 + 6x + 7 to the function shown in the graph to determine which statement is true.

Sugar free gum contains 40% less calories than regular gum if a piece of regular gum contains 40 calories, how many calories dose a piece of sugar free gum contain

How do I figure out the weight loss of tina? she lost 3 pounds on the first week of her diet. she gained a pound on the second week, and then lost 2 pounds a week during every week afterwards. she has been dieting for a total of 13 weeks.