Answer:
12
Step-by-step explanation:
17 + (-5) =
17 - 5 = 12
This the explanation
Answer:
15 gallons PLEASE GIVE BRAINLIEST
Step-by-step explanation:
55 x 6 = 330 total miles
330 ÷ 22 = 15 gallons of gas are needed
Answer:
11y + 2x + 12
Step-by-step explanation:
put similar numbers together:
1. 7y + 4y = 11y
2. 8 + 4 = 12
3. 2x has no match so it is left alone
Put the numbers back together into a new equation: 11y + 2x + 12
Answer:
The answer is
<h3>
![x = \frac{ - 1 + \sqrt{21} }{2} \: \: \: or \: \: \: x = \frac{ - 1 - \sqrt{21} }{2}](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B%20-%201%20%2B%20%20%5Csqrt%7B21%7D%20%7D%7B2%7D%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20or%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20x%20%3D%20%20%5Cfrac%7B%20-%201%20-%20%20%5Csqrt%7B21%7D%20%7D%7B2%7D%20)
</h3>
Step-by-step explanation:
x² + x - 5 = 0
Using the quadratic formula
That's
<h3>
![x = \frac{ - b\pm \sqrt{ {b}^{2} - 4ac } }{2a}](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B%20%20-%20b%5Cpm%20%5Csqrt%7B%20%7Bb%7D%5E%7B2%7D%20-%204ac%20%7D%20%7D%7B2a%7D%20)
</h3>
From the question
a = 1 , b = 1 , c = - 5
Substitute the values into the above formula and solve
We have
<h3>
![x = \frac{ - 1\pm \sqrt{ {1}^{2} - 4(1)( - 5) } }{2(1)} \\ x = \frac{ - 1\pm \sqrt{1 + 20 } }{2} \\ x = \frac{ - 1\pm \sqrt{21} }{2}](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B%20-%201%5Cpm%20%5Csqrt%7B%20%7B1%7D%5E%7B2%7D%20-%204%281%29%28%20-%205%29%20%7D%20%7D%7B2%281%29%7D%20%20%5C%5C%20x%20%3D%20%20%5Cfrac%7B%20-%201%5Cpm%20%5Csqrt%7B1%20%20%2B%2020%20%7D%20%7D%7B2%7D%20%20%5C%5C%20x%20%3D%20%20%20%5Cfrac%7B%20-%201%5Cpm%20%5Csqrt%7B21%7D%20%7D%7B2%7D%20)
</h3>
We have the final answer as
<h3>
![x = \frac{ - 1 + \sqrt{21} }{2} \: \: \: or \: \: \: x = \frac{ - 1 - \sqrt{21} }{2}](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B%20-%201%20%2B%20%20%5Csqrt%7B21%7D%20%7D%7B2%7D%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20or%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20x%20%3D%20%20%5Cfrac%7B%20-%201%20-%20%20%5Csqrt%7B21%7D%20%7D%7B2%7D%20)
</h3>
Hope this helps you