Question

The label on the car's antifreeze container claims to protect the car between −40°C and 125°C. To convert Celsius temperature to Fahrenheit temperature, the formula is C = 5 over 9 (F − 32). Write and solve the inequality to determine the Fahrenheit temperature range at which this antifreeze protects the car.

Answer 1

easiest to first rewrite it as
\[C = \frac{ 5 }{ 9 }(F - 32)\]\[\frac{ 9 }{ 5 }C = F - 32\]\[F = \frac{ 9 }{ 5 }C + 32\]

Answer 2

plug in C = -40 to get the low F in the range
then plug in C = 125 to get the high F in the range.

Answer 3

-31/5

Answer 4

thats what i got when i did 9/5 -40+32

Answer 5

how did you get that?

you want to plug in -40 then 125 to get a range:

\[F = \frac{ 9 }{ 5 }(-40) + 32\]and\[F = \frac{ 9 }{ 5 }(125) + 32\]

Answer 6

oh, you must mutliply :)

Answer 7

oh ok give me a min

Answer 8

-37 and 260

Answer 9

i get -40 and 257

Answer 10

pellet i did 35 not 32

Answer 11

you are correct

Answer 12

lol :)

Answer 13

how do i got about choosing the answer choice

Answer 14

the range in celcius was -40 to 125

the range in farenheit, by plugging in those values is -40 to 257

answer might look like this -40 F < T < 257 F

Answer 15

−40 > 5 over 9 (F − 32) > 125; −40 > F > 257

−40 < 5 over 9 (F − 32) < 125; −40 < F < 257

−40 < 5 over 9 (F − 32); −40 < F

5 over 9 (F − 32) < 125; F < 257

Answer 16

@divu.mkr

Answer 17

second one