1 mile is 5280 feet, therefore, we have 60 miles, and each mile is 5280 feet, so we multiply 5280 and 60, you get the answer of 316,800 feet.
74.4 is the answer.
hope this helps.
Answer:
Step-by-step explanation:
2m-10+6
or
2m-4
Answer:
![x = \frac{-(-2) \± \sqrt{(-2)^2 - 4*1*-3}}{2*1}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-%28-2%29%20%5C%C2%B1%20%5Csqrt%7B%28-2%29%5E2%20-%204%2A1%2A-3%7D%7D%7B2%2A1%7D)
Step-by-step explanation:
Given
![0 = x^2 - 2x -3](https://tex.z-dn.net/?f=0%20%3D%20x%5E2%20-%202x%20-3)
Required
The correct quadratic formula for the above
A quadratic equation is represented as:
![ax^2 + bx + c = 0](https://tex.z-dn.net/?f=ax%5E2%20%2B%20bx%20%2B%20c%20%3D%200)
And the formula is:
![x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-b%20%5C%C2%B1%20%5Csqrt%7Bb%5E2%20-%204ac%7D%7D%7B2a%7D)
So, we have:
![0 = x^2 - 2x -3](https://tex.z-dn.net/?f=0%20%3D%20x%5E2%20-%202x%20-3)
Rewrite as:
![x^2 - 2x - 3 = 0](https://tex.z-dn.net/?f=x%5E2%20-%202x%20-%203%20%3D%200)
By comparison:
![a= 1; b = -2; c = -3](https://tex.z-dn.net/?f=a%3D%201%3B%20b%20%3D%20-2%3B%20c%20%3D%20-3)
So, we have:
![x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-b%20%5C%C2%B1%20%5Csqrt%7Bb%5E2%20-%204ac%7D%7D%7B2a%7D)
![x = \frac{-(-2) \± \sqrt{(-2)^2 - 4*1*-3}}{2*1}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-%28-2%29%20%5C%C2%B1%20%5Csqrt%7B%28-2%29%5E2%20-%204%2A1%2A-3%7D%7D%7B2%2A1%7D)