Help me with the question of O. math​

Use δjkl and δmpn to determine whether don's claim is true or false. which of the following should don use to prove the triangles are similar? sss sas aas aa

What is the value of f(x) = 2.2 for f(-2)?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)