An office supplies salesperson sold $1,284 in week 1, $976 in week 2, $489 in week 3 and $1,042 in week 4

2-digit numbers less than 91 which are 1 less than a multiple of 10

Can someone pls ! pls answer all. no explanation needed..

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.