Gabrielle's age is two times Mikhail's age. The sum of their ages is 21 . What is Mikhail's age?

let the age be x and 2x

2x+x=21

3X=21

X=7

answer: the distance

step-by-step explanation:

to calculate the distance d of a line segment with endpoints (x1, y1) and (x2, y2) use the formula d (x2 x1)2 (y2 y1)2. to calculate the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) use the formula

y/x of point b= y/x of point a

step-by-step explanation:

(i got the same question, this was the correct answer.)