Temperatures on the Celsius and Fahrenheit scales are related by the function C = 5(F – 32)/9, where C is the temperature in degrees Celsius and F is the temperature in Fahrenheit. What temperature on the Celsius scale is equivalent to 77 degrees Fahrenheit?
A
15 degrees Celsius

B
20 degrees Celsius

C
25 degrees Celsius

D
30 degrees Celsius

Option C) 25 degrees Celsius

Step-by-step explanation:

C = 5(F – 32)/9

To find the equivalent scale in Fahrenheit, we substitute the value of F in the equation as 77.

Therefore:

C = 5(F – 32)/9

C = 5( 77 - 32 ) / 9

Simplify the brackets first, before opening it.

C = 5 ( 45) / 9

C = 5 * 5

C = 25 Degree Celsius

Option C is correct

Maths is fun!

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19