Derek is twice as old as Sarah. Two years ago the sum of their age was 20. How old is each now?

answer: 60%

explanation:

÷

= 60%

you have to stretch your thinking

step-by-step explanation:

1. a.) 2

2. d.)  the function has three real zeros. the graph of the function intersects the x-axis at exactly three locations.

3. a.) 3

4. c.) f(x) + (x+2)()(- ))

(5.)

1.) x = -3 

2.)x = 4

  3.) x = -4