Select yes or no for each statement using the table below!

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.