The 8 pound bag of dog food for $7.40 is the better buy.
Answer:
c=2
Step-by-step explanation:
(ax+2)(x+b) = ax^2+2x+abx+2b = ax^2+(2+ab)x+2b
Given, ax^2+(2+ab)x+2b = 3x^2+5x+c
a=3
2+ab=5 => 2+3b=5 => 3b=5-2=3 => b=1
2b=c => c=2*1 = 2
So, c=2
Try this solution:
1. rules:
2. according to the rule described above:
P(x) = 3x + 200
x=4 ⇒ p(4) = 3(4)+200=12+200=212
x=15 ⇒ p(15) = 3(15)+20=45+200=245
n(x) = 200(1.04)^x
x=4 ⇒ n(4) = 200 (1.04)^4 = 233.97
x=15⇒n(15)=200(1.04)^15 = 360.19
Then n(x) has the highest value in 4 years; n(x) has the highest value in 15 years
