Answer:
0---------------
Step-by-step explanation:
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:
There would be 55 boys
Step-by-step explanation:
12-17=5 60-5=55 I hope this help you.
Answer: 24 min
Step-by-step explanation:
2 hrs / 5 carts = 120 min / 5 carts
120 / 5 = 24 min / 1 cart
15/30= 1/2
2/4=1/2
The answer is B