Question

The label on the car's antifreeze container claims to protect the car between -30°C and 130°C. To convert Celsius temperature to Fahrenheit temperature, the formula is C = 5/9 (F - 32). Write and solve the inequality to determine the Fahrenheit temperature range at which this antifreeze protects the car.

-30 > 5/9 (F - 32) > 130; -22 > F > 266
-30 < 5/9 (F - 32) < 130; -22 < F < 266
-30 < 5/9 (F - 32); -22 < F
5/9 (F - 32) < 130; F < 266

Answer 1

Just simplify it like you would an equation with an equals sign, but whatever you do to one side, you do to every side.

Answer 2

What!? haha

Answer 3

-30°C and 130°C
first this will mean

-30 < C < 130

since C is literally between those two temperatures, then use the formula they give for C, to replace C:

-30 < 5/9 (F - 32) < 130

now start doing math.

Answer 4

I think its B -30 < 5/9 (F - 32) < 130; -22 < F < 266 @agent0smith ??

Answer 5

Well once you have what i wrote, there's only one answer that makes sense.

Answer 6

I was thinking be but I'm never sure of anything when it comes to math

Answer 7

-30 < 5/9 (F - 32) < 130

Be sure by multiplying all sides of the inequality by 9, then dividing all sides by 5, then adding 32 on all sides.

Answer 8

A!

Answer 9

A has the signs the wrong way around.

Answer 10

im sticking with B lol

Answer 11

I never said it wasn't B :P

Answer 12

O my gosh my head hahaha thank you both :)

Answer 13

ur welcome