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RUDIKE [14]
3 years ago
15

More math and its my last question

Mathematics
1 answer:
vaieri [72.5K]3 years ago
4 0

We know that ∠1 equals ∠3, from that we can find x:

10x = 100 \\ x = 10

The sum of ∠1 and ∠2 must equal 180°:

10x + 10y + 20 = 180

Since we already know x, we can solve for y:

10 \times 10 + 10y + 20 = 180 \\ 10y + 120 = 180 \\ 10y = 60 \\ y = 6

Result: x=10, y=6

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lubasha [3.4K]
The degree of a polynomial is the highest power of its terms.
The power of a term is the sum of the powers of all the variables in a term.
A polynomial is written starting with the greatest power in standard form.
In the first case, the power of the first term is 3, the power of the second is 3 (2 from x + 1 from y) but the power of x has decreased so it is the second term, and then so on. 
In the second case, the power is starting form 2 and then increasing to 3. This is incorrect.
Therefore, Marcus' suggestion is correct.
4 0
3 years ago
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hope this helps! and sorry for the person just trying to get points.

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3 years ago
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A = 307.9 sq/cm

Step-by-step explanation:

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what will be the area of that semicircle?

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