1. 1-tan A/1+tan A = Cos A- sinA/ cos A+sin A 2. 1+sin A/cos A = cos A/ 1-sin A

3. ( √ sec2 A - 1) (√1- sin2 A) = sin A

4. √1-sin A/1+ sinA = sec A- tan A​

the correct is answer is a 9-sided polygon!

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)