Element X decays radioactively with a half life of 11 minutes. If there are 180 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 17 grams?

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°