Help me please as fast as fast as you can 20 points!!

see below

Step-by-step explanation:

4! = 4*3*2*1 = 24

10 C3 = 10 CHOOSE 3 =10! /(3! (10 - 3)!) = 10! / 3! * 7! = 10*9*8 / 3*2*1 = 120

7P3 = permutation = 7! / (7-3)! = 7! /4! = 7*6*5 = 210

a) 0.25x times 3. (could be wrong on equation.)

b) 2.25 pound of dark chocolate. (can i eat all the chocolate? plz? anyway, again, could be wrong, but i hope im right. all the chocolate together should be 5.25 pounds)

have a good day!

sina-sinb

cosb+cosa

tana-tanb

cos0+cos x pi/3

20tan

step-by-step explanation: