Gary’s party ended at 10:00 pm. It lasted 3.5 hours. What time did the party start?
1 answer:
You might be interested in
<h3>Answer:</h3>
- left picture (bottom expression): -cot(x)
- right picture (top expression): tan(x)
A graphing calculator can show you a graph of each expression, which you can compare to the offered choices.
_____
You can make use of the relations ...
... sin(a)+sin(b) = 2sin((a+b)/2)cos((a-b)/2)
... cos(a)+cos(b) = 2cos((a+b)/2)cos((a-b)/2)
... cos(a)-cos(b) = -2sin((a+b)/2)sin((a-b)/2)
Then you have ...
and ...
Answer:
Price of 23 toys = $276
Price of 1 toy =
Price of 12 toys =?
Price of 12 toys =