Answer
a) 110 - 80 = 30
b) 3(-9 + 11) = 6
c) $\frac{24}{-6}$ = -4
Work Step by Step
a)
"The difference of 110 and 80" means 110 - 80.
The difference of 110 and 80 is 30 means 110 - 80 = 30.
b)
"The product of 3 and the sum of -9 and 11" means 3(-9 + 11).
That amounts to 6, which makes the equation 3(-9 + 11) = 6.
c)
"The quotient of 24 and -6" means 24 divided by -6, or $\frac{24}{-6}$.
That yields -4, which makes the equation $\frac{24}{-6}$ = -4.