Answer:
7 months
Step-by-step explanation:
An equation which gives us J's weight after any particular month is
W(m) = 180 lb - (5 lb/mo)t
Her goal weight is 145 lb.
Therefore, write:
W(m) = 145 lb = 180 lb - (5 lb/mo)t.
We must solve this equation. To do so, subtract 180 lb from both sides of the equation:
145 lb - 180 lb = - (5 lb/mo)t
-35 lb = - (5 lb/mo)t
t = 35 lb / (5lb/mo) = 7 mo
J. must diet for 7 months to get her weight down to 145 lb from 180 lb.
