Give me three examples of unit rates that whould be used to detemean the price of something hurry pl

Write a story that matches with the expression 42x-5 pls hurry

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6