1. Suppose the positive numbers a և b are such that a + b = 7. A. b-1:
B. 1:
Գ. 0:
D. -1:
E. a

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

Afarmer sells 9.5 kilograms of apples and pears at the farmer's market. 4/5 of the weight is the apples and the rest is the pears. how many kilograms of pears did she sell at the farmers market

How to do this , and can some one explain