What would the temperature at the top of the mountain be? i've tried -19.25 and 19.25 and they're both wrong

54.75

Step-by-step explanation: You will lose an average 3.5 degrees Fahrenheit for every 1000 feet of elevation, so you would LOSE 19.25 farenheit off the 74 fahrenheit equalling 54.75.

First time doing this kind or equation, but hope this helps!

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true

the answer would be  

a.

3: 1

step-by-step explanation: