Help pls im doing a test and i want it to be pver

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

Heather is a cashier. she can ring up 1212 customers in 99 minutes. at this rate, how many minutes does it take her to ring up 44 customers?

Find the power set of each of these sets, where a and b are distinct elements. a) {a} b) {a, b} c) {1, 2, 3, 4} show steps