What is the equation of a line that passes through the point (1,8) and is perpendicular to the line whose equation is y=x/2 + 3

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30