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ser-zykov [4K]
2 years ago
8

Find the value of x I’d appreciate if you could explain as well if not that’s fine

Mathematics
1 answer:
Kipish [7]2 years ago
7 0
All the angles in a circle equal to 360 degrees. So basically just add up all the known values: 23+23+15=61 and then subtract that from 360: 360-61=299.

You can also do 23+23+15+x=360. Adding it all becomes 61+x=360, subtract 61 from both sides of the equation, and you get x=299.

(Something to help remember is that the angle is obtuse, meaning it’s automatically more than 90 degrees, hope this helps!)
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yarga [219]

Because this is a fourth degree that will be tricky to factor as it is, we will do a u substitution. Let x^2=u. We can now rewrite that polynomial in terms of u: u^2-7u-8=0. Filling into the quadratic formula we have u=\frac{7+/-\sqrt{49-4(1)(-8)}}{2}. Simplifying down u=\frac{7+/-\sqrt{81}}{2} and u=\frac{7+9}{2} or u=\frac{7-9}{2}. That means that u = 8 or u = -1. But don't forget that we let u=x^2, so we have to put x-squared back in for u. That gives us x^2=8 which simplifies down to +/-2\sqrt{2}. That also gives us x^2=-1. When we take the square root of -1, we have to use the fact that -1 = i^2, so we sub that in to get x=+/-i. All in all, your solutions are as follows: 2\sqrt{2},-2\sqrt{2},i,-i which is choice b.

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3 years ago
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Step-by-step explanation:

‍♀️

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Anni [7]
X=69 for the second one
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3 years ago
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I really need help with this its past due
zloy xaker [14]
Sorry but grade math is this so I can have a better understanding
7 0
2 years ago
How many solutions does the equation have?
Andreyy89

Answer:

Since it is a linear equation, it has one solution.

step-by-step explanation:

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