One evening decreased by 5 degrees farenheit during the first hour after sunset, and then decreased by 2 degrees each hour for the next 7 hours. The temperature increased by 14.5 degrees the next morning and then increased by 11 degrees that afternoon. What was the total change in temperature?

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

5

10

15

20

25

30

35

40

45

50

55

45.36 feet per second

step-by-step explanation:

tyrone travels 30 miles in 58.2 minutes.  

1 mile = 5280 feet; this means he travels

30(5280) = 158400 feet in 58.2 minutes.

1 minute = 60 seconds; this means he travels 158400 feet in

58.2(60) = 3492 seconds.

this gives us the unit rate of

158400/3492 = 45.36 feet per second.