Help me please I really need it

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

Classify the following triangle check all that apply

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?