X^2 - 8x-9=0
D = b^2- 4*a*c = 64- 4* (-9) = 64+36=100 =10^2
X1 = (8-10)/2 = -1
X2= (8+10)/2= 9
Answer:
11:3
Step-by-step explanation:
For every 11 y there is 3x
Answer:
12
Step-by-step explanation:
the proportion is 120/10=1200%
I'm sorry if this is wrong
i think the answer is c :)