If i dozen people get on a train and five of them get off at the next stop how many of those people are left on train

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.

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy.how much will she pay after the discount

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?