4+X/2=8 what does X equal

What is 800 times the size of a marble

A ball is launched into the sky at 18 feet per second from a 18 meter tall building. The equation for the ball's height, h, at time t seconds is h = - 6t2 + 18t + 18. When will the ball strike the ground?

A and B are independent events. P (A) = 0.60 and P (B) = 0.30 what is P (A and B)

Monica earned twice as much as Samuel mowing lawn Monica earned $56. Write an equation to find, s, the amount of money Samuel earned?

If 25 students took an exam and 4 of them failed, what percent of them passed?

What does "to factor" mean? find a synonym for it?

The height of the flagpole, f, and the length

Solve this system of linear equations. Separate the x - and y-values with a comma. 9x - 5y = 70 3x - 3y = 18

3.4348567000*10^10 in standard form

Aeva is selling friendship pins as a service project. Each pin with green beads sells for $3. Each pin with red beads sells for $2. She raised $312. The number of pins with green beads is 11 fewer than the number of pins with red beads.