Answer:
68
Step-by-step explanation:
F = 1.8(20)+32 = 68
Answer:
81-25k²
Step-by-step explanation:
We need to write the expression for "The quantity 81 minus 5k, squared".
Square of any number x is given by x².
Square of 5k is given by : (5k)²= 5²×k²=25k²
Now subtract 25k² from 81.
It means we get : 81-25k². It is required expression.
Negative 1 because 3 x 3 is 9 and -2 x 5 is -10. Therefore 9-10= negative 1