Answer:
C
Step-by-step explanation:
Answer:
12
Step-by-step explanation:
x^2-2x+4 replace -2 for x
-2^2-2(-2)+4
4+4+4
12
Answer:
AB=2.1
Step-by-step explanation:
we know that
Applying the Intersecting Secant-Tangent Theorem
![(BC+AB)(AB)=AD^{2}](https://tex.z-dn.net/?f=%28BC%2BAB%29%28AB%29%3DAD%5E%7B2%7D)
substitute the given values and solve for AB
![(15+AB)(AB)=6^{2}](https://tex.z-dn.net/?f=%2815%2BAB%29%28AB%29%3D6%5E%7B2%7D)
Let
x=AB
substitute
![(15+x)(x)=36](https://tex.z-dn.net/?f=%2815%2Bx%29%28x%29%3D36)
![x^{2}+15x-36=0](https://tex.z-dn.net/?f=x%5E%7B2%7D%2B15x-36%3D0)
Solve the quadratic equation by graphing
The solution is x=2.1
see the attached figure
therefore
AB=2.1
-5/12 + (-1/4) + 3/12
Find the least common denominator.
-5/12 - 3/12 + 3/12
Combine like terms.
-5/12 is your final answer.
It was given that
1 gal = 20 lbs of CO2
1 gal = 25 miles distance
Thus,
15000 miles/year ( 1 gal / 25 miles ) ( 20 lbs CO2 / 1 gal ) = 12000 CO2
<span>If Harry drives 15,000 miles per year, his vehicle will add 12000 pounds of CO2 to the atmosphere.</span>