Andrea can rollerblade faster than most skateboarders, she can go 250 feet in 10 seconds. At this rate, how many miles can she ride in 1 hour (mph)? (remember, 1-mile=5,280 feet).
this unit is on unit conversions pleas help and provide expressions please i'm desperate and please show your work as well!

She can ride 17.045 Miles in one hour.

Step-by-step explanation:

(250 feet/10 seconds) x (1 mile/5280 feet) x (60 seconds/ 1 minute)  x (60 minutes/ 1 hour) = 17.045 Miles per hour

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: