What is the distance between the points (7.8) and (-8, 0) on a coordinate grid?

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

How do i put 3(x+7) in distributive property