<span>Identify the slope, m. This can be done by calculating the slope between two known points of the line using the slope formula.<span>Find the y-intercept. This can be done by substituting the slope and the coordinates of a point (x, y) on the line in the slope-intercept formula and then solve for b. hope this help</span></span>
Let Tritt's age = t & Jan's age = 2t - 3
if the sum of their ages equals 30 then..

combine terms and simplify

now simply divide

and to find Jan's age just plug 9 in


Jan's age = 15
Tritt's age = 9
Answer:
119.30
Step-by-step explanation:
119.30 rounded to the nearest hundredth is 119.30 because 0 is in the hundredth place, and there is no thousandths
Your answer would have to be 91 :)
(open picture for the explanation)