R, S, and T are collinear. S is between R and T. RS = 2w+1, ST = w-1, and RT = 18

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.

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