Question

Plsss help!!!

Evaluate for C when F =77º

C = 5/9 (F – 32)

A. 25
B. 45
C. 60
D. 80

Answer 1

Convert 77 °F to °C

To convert from Celsius to Fahrenheit. We apply the following formula:

`\bf{^(\circ)C= (5)/(9)(^(\circ)F-32) \ \longmapsto \ Formula }`

We substitute the number 77 where the Fahrenheit degrees are, and we are left with the following form.

`\bf{^(\circ)C= (5)/(9)(77-32) \ \longmapsto \ \ Subtract \ 32 \ from \ 77. }`

`\bf{^(\circ)C= (5)/(9)*45 \ \longmapsto \ \ Multiply \ 5*45, divide \ by \ 9 }`

`\bf{^(\circ)C=25}`

So 77 Fahrenheit, on the Celsius scale is 25.So the correct alternative is option "A".

Answer 2

A. 25°C

Explanation:

C=5/9(77-32)

C=5/9(45)

C=25°C