Answer:
= 6.5
Step-by-step explanation:
You have to plug in 1.5 for x
->
4(1.5) + 0.5 = 6.5
Answer:
8.04672
Step-by-step explanation:
For each mile you have 1.609 kilometers hope this is helpful.
7.91 = 8 21.9 = 22
8 + 22 = 30
Answer:
![x = \frac{-7 +\sqrt{489} }{2}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-7%20%2B%5Csqrt%7B489%7D%20%7D%7B2%7D)
![x = \frac{-7 - \sqrt{489} }{2}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-7%20-%20%5Csqrt%7B489%7D%20%7D%7B2%7D)
Step-by-step explanation:
2x² +21x-61 = (x+7)²
expand
2x² + 21x - 61 = x² + 14x +49
move everything to one side
x² + 7x - 12 = 0
use quadratic formula
![x = \frac{-b +- \sqrt{b^{2}-4ac } }{2a}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-b%20%2B-%20%5Csqrt%7Bb%5E%7B2%7D-4ac%20%7D%20%7D%7B2a%7D)
plug in the values
![x = \frac{-7 +- \sqrt{7^{2}-4(1)(-110) } }{2(1)}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-7%20%2B-%20%5Csqrt%7B7%5E%7B2%7D-4%281%29%28-110%29%20%7D%20%7D%7B2%281%29%7D)
solve
![x = \frac{-7 +- \sqrt{49-4(1)(-110) } }{2}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-7%20%2B-%20%5Csqrt%7B49-4%281%29%28-110%29%20%7D%20%7D%7B2%7D)
![x = \frac{-7 +- \sqrt{49 + 440 } }{2}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-7%20%2B-%20%5Csqrt%7B49%20%2B%20440%20%7D%20%7D%7B2%7D)
![x = \frac{-7 +- \sqrt{489} }{2}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-7%20%2B-%20%5Csqrt%7B489%7D%20%7D%7B2%7D)
Answer:
28 - m = 3
28 - 3 = m
25 = m
Hope this helps :) mark me brainliest if you want to