X + y = 12 and y = x - 1.
Find the value of 2x + 2y.

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

What is the value of x in the diagram below?

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap