Answer:
x=9,-1 and 
Explanation:
we have been given with the quadratic equation 
we compare the given quadratic equation with general quadratic equation
general quadratic is 
from given quadratic equation a=1,b= -8,c= -9
substituting these values in the formula for discriminant 

Now, to find the value of x
Formula is 
Now, substituting the values we will get

And rewritting the given equation by shifting 9 to right hand side of the given equation and taking minus inside the bracket so as to convert it in the form of

Answer: B)1,047 feet
Step-by-step explanation:
Hi, to answer this question, first, we have to calculate the circumference of the tire:
Circumference(C): π x diameter
C = π (20) = 62.83 inches.
Since 1 foot is equal to 12 inches.
62.83 ÷ 12 = 5.23 feet
Finally we have to multiply the result by 200:
5.23 x 200 = 1,047 feet
Feel free to ask for more if needed or if you did not understand something.
Answer:
Step-by-step explanation:
9/15y + 3/21 = 5/15 y - 14/21. Adding 14/21 to both sides we then get 9/15y + 17/21 = 5/15y. Subtracting 5/15y from both sides, we get 4/15y + 17/21 = 0.
Then we get 4/15y = -17/21. Dividing by 4/15 gets us -17/21 * 4/15 = -68/315 = y.