The width of a rectangle measures (8.4a + 7.5) centimeters, and its length measures (7.4a - 4.4) centimeters. Which expression represents the perimeter, in
centimeters, of the rectangle?
15.9a + 3
O 31.8a + 6

15.8a + 3.1
31.6a + 6.2

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

How do you solve a question like this?

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?