Answer:
Yes.
Step-by-step explanation:
Friend's answer is correct.
Hint: 1 - Cos² A = Sin² A
1 3/40
1 1/4 +1 1/5 +7/8= 3 13/40
3/4 .3= 2 1/4
3 13/40 - 2 1/4
I hope this helped!
72
mean=average. to get average, you add up the numbers and divide by how many numbers. they add upp to 288 and since theres 4 test grades, divide by 4 to get 72.
