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Paraphin [41]
3 years ago
6

NEED HELP FRERE BRAINLIST

Mathematics
1 answer:
Whitepunk [10]3 years ago
4 0

Answer:

7.5

Step-by-step explanation:

a^2+b^2=c^2\\x^2+5^2=9^2\\x^2+25=81\\x^2=56\\\sqrt{x^2} =\sqrt{56} \\x=7.5

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777dan777 [17]

Answer:

the correct answer is d

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3 years ago
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It is known that the point P(-9,18) belongs to the graph of the function y=k/x. Find k.
riadik2000 [5.3K]

Answer:

k = (-162).

Step-by-step explanation:

A point of the form (x_{0},\, y_{0}) belongs to the graph of this function, y = k / x, if and only if the equation of this function holds after substituting in x = x_{0} and y = y_{0}.

The question states that the point (-9,\, 18) belongs to the graph of this function. Thus, the equation of this function, y = k / x, should hold after substituting in x = (-9) and y = 18:

y = k / x.

18 = k / (-9).

Solve this equation for the constant k:

\begin{aligned}k &= 18 \times (-9) \\ &= (-162)\end{aligned}.

Thus, k = (-162).

6 0
2 years ago
<img src="https://tex.z-dn.net/?f=%5Csqrt%7B12%7D%20%2B4%5Csqrt%7B25%7D%20-%5Csqrt%7B108%7D%20-%5Cfrac%7B1%7D%7B4%7D%20%5Csqrt%7
Eduardwww [97]

20−6√3

Step by step Explanation:

√12+4√25−√108−1/4 √192

2√3+4×5-√108-2√3

2√3+20-√108-2√3

20−6√3

7 0
3 years ago
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Manuel worked 5 days a week, and 6 hours each day. That week he earned 337.50. What was his hourly rate
Irina18 [472]
11.25
Hope this helps!
8 0
3 years ago
Question 15 (1 point)
ArbitrLikvidat [17]

Answer:

19%

Step-by-step explanation:

(8/42) * 100 = 19%

Thenks and mark me brainliest :))

6 0
3 years ago
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