Question

A city known for its temperature extremes started the day at -5 degrees Fahrenheit. The temperature increased by 78 degrees Fahrenheit by midday, and then dropped 32 degrees by nightfall. a. What expression can you write to find the temperature at nightfall? b. What expression can you write to describe the overall change in temperature? c. What is the final temperature at nightfall? What is the overall change in temperature?

Answer 1

Answer: a)
`-5+78-32`, b)
`+78-32`, c)
`41^\circ F` d)
`46^\circ F`

Explanation:

Since we have given that

Temperature at the day = -5° F

Temperature increased by midday = 78° F

Temperature dropped by nightfall = 32° F

a. What expression can you write to find the temperature at nightfall?

Temperature at nightfall would be

`-5+78-32`

b. What expression can you write to describe the overall change in temperature?

Overall change would be

`+78-32`

c. What is the final temperature at nightfall?

`-5+78-32\\\\=78-37\\\\=41^\circ F`

d. What is the overall change in temperature?

`+78-32\\\\=46^\circ F`

Hence, a)
`-5+78-32`, b)
`+78-32`, c)
`41^\circ F` d)
`46^\circ F`

Answer 2

well, if it starts off at -5 and you add 78 and subtract 32, the answer will be 41. the expression that you can use for the overall change in temperature is -5+78-32 then that will be the answer. the final temperature in nightfall is 41. you add 78 to -5 and subtract 32 from the 73 which came from adding -5 and 78 together. then you solve. which will be 41 as your final answer. the overall change in temperature is 37 degrees