Solve −3x2 + 30x − 90 = 0. Group of answer choices

x equals 5 plus or minus 2i square root of 5

x equals 5 plus or minus i square root of 5

x equals 10 plus or minus i square root of 5

x equals 10 plus or minus 2i square root of 5

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.