If -4 - (-9) = x, what is the value of -3x?

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i