The decrease:
125000 - 117500 = 7500
Percentage of decrease = 7500/125000 x 100 = 6%
Given the quadratic function, to get the roots we factorize:
3x²-4x-7=0
3x²+3x-7x-7=0
3x(x+1)-7(x+1)=0
(3x-7)(x+1)=0
thus the roots are
x=-1 or x=3/7
thus the sum of the roots will be:
-1+3/7
=-4/7
Answer: 18
Step-by-step explanation:
9+9
