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olchik [2.2K]
3 years ago
15

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Mathematics
1 answer:
kifflom [539]3 years ago
3 0

If it is perpendicular to the line 14x-7y=4, then we know our line has the opposite and inverse slope of that line. Solving for y of the first line, we get y=2x-(4/7). All we care about is the coefficient of the x term, because that will give us our slope. The slope of the first line is 2, so the slope of out line is the opposite and inverse of that slope, which -(1/2).

Plugging into our slope- point formula, where y1=(-9), x1=2, and m=(-1/2), then:

y-(-9)=(-1/2)(x-2)

y+9=(-1/2)x+1

y=(-1/2)x-8

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Answer:

Step-by-step explanation:

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Let the total outcome be n,

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Third situation,

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Fourth situation

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Then, arranging from the order of highest frequency

Then,

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3 0
3 years ago
The perimeter of a square is 56 cm. What is the approximate length of its diagonal? A.10.6 cm
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For an experiment, the temperature of a liquid must stay above 60°F . The starting temperature of the liquid is 90°F . It is pla
HACTEHA [7]
The answer is <span>The liquid must be in the cooler fewer than 10 minutes.
</span>
Let:
m - the number of minutes the liquid is in the cooler.
a - the starting temperature
The function is:
f(m) = a - 3 * m     (Since the temperature decreases by 3°F each minute m, it has a negative sign)
Let:
m - <span>the number of minutes the liquid is in the cooler.
a - the starting temperature
</span>a = 90<span>°F 
</span>
<span>The temperature of a liquid must stay above 60°F:
f(m) > 60

Thus:
</span>f(m) = a - 3 * m 
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a - 3 * m > 60
90 - 3m > 60
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3 0
3 years ago
Find the area of an octagon with a radius of 11 units. Round your answer to the nearest hundredth. NO LINKS
xeze [42]

Answer:

342.24 units²

Step-by-step explanation:

The area of one of the 8 triangular sections of the octagon is ...

A = (1/2)r²·sin(θ) . . . . . where θ is the central angle of the section

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A = 8·(1/2)·11²·sin(360°/8) = 242√2

A ≈ 342.24 units²

8 0
3 years ago
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