11. 1/4
12.1/10
13.9/40
14.3/8
15.4/5
Let's start from the left side, and manipulate it to get the right side, which would prove the identity.
We know that:
i)

ii)

.
From the above fundamental identities, we can rewrite the left hand side as:


,
which is what we needed to show.
Answer:
Place the f(x) expression 2x-3 into the x in the g(x) expression 4x+5, so it will be 4(2x-3)+5; you can expand it out if you want
Answer:
70.5
Step-by-step explanation:
Refer to attached image
Answer:
Step-by-step explanation:
its 9