Answer:
Step-by-step explanation:
Answer:
she rode 6.6 miles per hour
at that rate she would travel 36 miles in 5 hours, 27 minutes, 16 seconds.
To solve, you must make one side of the equation equal to zero. We can do this by subtracting 3x on both sides of the equation.
<span>x^2 + 7x = 3x
</span> - 3x -3x
x^2 + 4x = 0.
Then we substitute the equation into the quadratic equation.
![\frac{-b+- \sqrt{b^2-4ac} }{2a}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-b%2B-%20%5Csqrt%7Bb%5E2-4ac%7D%20%7D%7B2a%7D%20)
Where a = 1 b = 4 and c = 0
![\frac{-(4)+- \sqrt{(4)^2-4(1)(0)} }{2(1)}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-%284%29%2B-%20%5Csqrt%7B%284%29%5E2-4%281%29%280%29%7D%20%7D%7B2%281%29%7D%20)
We first solve whats inside the square root.
![\frac{-(4)+- \sqrt{16} }{2(1)}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-%284%29%2B-%20%5Csqrt%7B16%7D%20%7D%7B2%281%29%7D%20)
![\sqrt{16} = 4](https://tex.z-dn.net/?f=%20%5Csqrt%7B16%7D%20%3D%204)
Now we solve for -4 and 4.
![-4 - 4 = -8](https://tex.z-dn.net/?f=-4%20-%204%20%3D%20-8)
![-4+4=0](https://tex.z-dn.net/?f=-4%2B4%3D0)
Then divide both answer by 2
![\frac{-8}{2} = -4](https://tex.z-dn.net/?f=%20%5Cfrac%7B-8%7D%7B2%7D%20%3D%20-4)
The division of any by zero is zero
So the answer are x = -4 and x = 0
Answer:
1.345*10^10
Step-by-step explanation:
count the number of steps needed to place a decimal point after the first digit i.e (1) then raise those number of steps to power 10.
its as simple as that :)
Answer:
a.) DomainL: -2 ≥ x < 1 Range: 1 ≥ y < 2
b.) DomainL: -2 > x < 2 Range: -2 > y < 2
Step-by-step explanation:
look up what the open and closed dots mean
understand how to determine values on the y or x axis