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dusya [7]
3 years ago
14

Please help me !!!!!!!!

Mathematics
2 answers:
shutvik [7]3 years ago
6 0
41^2 - 40^2 = 1681 - 1600 = 81

side xy = square root 81 = 9

cosine(X) = Adj / Hypo
cosine(X) = 9/41
answer
C. 9/41
astraxan [27]3 years ago
5 0
It's C the missing side is 9 units long so since cosine is adjacent divided by hypotenuse it would be 9/41
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kodGreya [7K]
The answer is 10/3, the whole number form of it is 3 1/3 :)
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Please help!<br><br>4^x*5^y=20, 4^y*5^x=20^2, x+y=?​
photoshop1234 [79]

Answer:

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Step-by-step explanation:

conclusion x + y = 2 OR 4

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Answer:

4512 handshakes

Step-by-step explanation:

We are told in the question, that there are

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Assuming that no husband or wife shakes each others hand but everyone else shakes hands exactly once

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48 couples will shake 94 people because they are excluded

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6 0
3 years ago
The height of a trapezoid can be expressed as x – 4, while the bases can be expressed as x + 4 and x + 9. if the area of the tra
AlexFokin [52]

Answer: 19 cm

<u>Step-by-step explanation:</u>

A_{trapezoid}=\frac{b_{1}+b_{2}}{2}*h

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                99 = \frac{(2x + 13}{2}*(x - 4)

              198 = (2x + 13)(x - 4)

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5 0
3 years ago
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Hello may i please have help with this question
Pani-rosa [81]

Answer:

x=√139-3, x=-√139-3

Step-by-step explanation:

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now, you find the perfect square trinomial. You divide the b value by 2, then square it: 6/2=3, 3^2=9.

What you do to one side has to be done with the other.

x^2+6x+9=130+9

now you can factor the square:

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x+3=√139

x+3=-√139

now subtract both sides by 3

x=√139-3

x=-√139-3

5 0
2 years ago
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