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 over 9 (F − 32). Write and solve the inequality to determine the Fahrenheit temperature range at which this antifreeze protects the car.

−30 > 5 over 9 (F − 32) > 130; −22 > F > 266
−30 < 5 over 9 (F − 32) < 130; −22 < F < 266
−30 < 5 over 9 (F − 32); −22 < F
5 over 9 (F − 32) < 130; F < 266

Answer 1

convert both of those max and min temp values in Celcius, over to F using that given relationship

Answer 2

OKAY. I am doing that now.

Answer 3

Lower Celcius < FOrmula C to F < upper celcius

they want the inequality like that... the celcius relationship

Answer 4

What will the answer be?

Answer 5

then solve that for F in the middle, or just figure the two limits for F by converting both bounds


-30 = (5/9)*(F - 32)
130 = (5/9)*(F - 32)

Answer 6

greater than the first , less than the second

Answer 7

So that is a?

Answer 8

really dont have to calculate since all the answers give you -22 for lower and 266 for upper F degrees

Answer 9

No, A) says something is less than -30 and larger than 130 at the same time, that is not possible

Answer 10

okay does that make it B?

Answer 11

yes, the temp range is between those values, a compound inequality like that can be written for it then

Answer 12

that form means both are true at the same time

Answer 13

Thank you! You are a great teacher.

Answer 14

A says somethign similar to , a number is smaller than 1 and bigger than 1 at the same time,

that form requires an OR statment and two seperate inequalities

Answer 15

welcome, anytime