Answer:
Option B, 22
Step-by-step explanation:
Alternate interior angles are same
Let s=number of seeds and t=number of days...
st=120 and (s+10)(t-2)=120
From the first we can say t=120/s, now using this value of t in the second equation gives us:
(s+10)(120/s-2)=120
(s+10)(120-2s)/s=120
(s+10)(120-2s)=120s
120s-2s^2+1200-20s=120s
2s^2+20s-1200=0
s^2+10s-600=0
(s+30)(s-20)=0, since s>0
s=20, and since she planted s+10 seeds per day to finish two days earlier:
20+10=30
She planted 30 seeds per day.
The process of finding the product of two integers is multiplying them. A product is the answer to a multiplication problem.
E.g.:
Integers: 5 and 2
5*2 or 5 x 2
=10
Product: 10
