91 is 25 percent of what?

364

Step-by-step explanation:

25% is the same as 1/4

so if 91 is equal to 1/4 of something

all you have to do is multiply 91 by 4

Step-by-step explanation:

My method is multiplying 91 by 4 because 91 x 4 is 364 which if you divide 364 by .25 which is 1/4 in decimal form, you get 91. So the final answer to this 364.

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92