Answer:
It cannot be answered if we don't figure out what x means. IF we knew what X is we can multiply 6 by x and then add 7.
an example would be if x was 3. we could figure out the answer by just doing (6*3)+7=25
What are you trying to prove here? I know when step will be the use of the Transitive Property. If a=b, and b=c, then a=c.
-6x-x^2-8 = -(x+2) x (x+4)
(This is if you are factoring the expression)
You have to add them all together to get 25. 16 students did not say blue, so you have to divide 16 by 25. 64% did not choose blue