When a quadratic equation ax^2+bx+c has a double root, the discriminant,
D=b^2-4ac=0
Here
a=2,
b=b,
c=18
and
D=b^2-4ac=b^2-4*2*18=0
solve for b
b^2-144=0
=> b= ± sqrt(144)= ± 12
So in order that the given equation has double roots, the possible values of b are ± 12.
Answer:
I believe its 66
Step-by-step explanation:
55×20%=11
55+11=66
Answer:
Cindy's error is that an integer is not always negative
C. The time the car is owned is greater than 0
Function:
Where x denotes years
y denotes annual cost
We are given that the graph of the given equation should have vertical asymptote at x =0
Refer the attached graph .
Since with increase in the time the cost (y) decreases
So, the time must be greater than 0 So, that the change in the cost appears .
So, the graph of the given equation should have vertical asymptote at x =0 because The time the car is owned is greater than 0.
Hence Option C is correct : The time the car is owned is greater than 0.
