Evaluate the function f (x)=2×-2, when x=-1

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?

Find the measure for the angle indicated in bold

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