Answer:
If a = the number of adult tickets sold, then (a + 20) = the number of student tickets sold
a + (a + 20) = 240
2a + 20 = 240
2a = 220
a = 110
There were 110 adult and 110 + 20 = 130 student tickets sold
Step-by-step explanation:
Answer:
my higley complex an all knowing answer is c
Step-by-step explanation:
i used my amazing wisdom an big brain and gussed
Answer:
Step-by-step explanation:
First you mean: cos2x = (cosx)^2
For A. 2(cosx)^2-1 = 1 - 2(sinx)^2
we have (cosx)^2 + (sinx)^2 = 1, This is an identity
For B. secx cscx(tanx + cotx) = sec2x + csc2x
So the B is an identity.
For C, I do not understand the ?
For D secax is what?