Someone please help quickly. If you were to randomly survey 20 people at 50 randomly chosen high schools, would this be a random sample? Why or why not?

25 ! i need asap! ! ill mark brainliest!

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is