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Ainat [17]
3 years ago
14

Help please due today.

Mathematics
1 answer:
BARSIC [14]3 years ago
5 0

Answer:

A) \frac{7}{tan55^\circ}

Step-by-step explanation:

tan\theta=\frac{opposite}{adjacent}\\ \\tan55^\circ=\frac{7}{BC}\\ \\BC*tan55^\circ=7\\\\BC=\frac{7}{tan55^\circ}

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PLEASE HELP
nekit [7.7K]

Answer:

y= -(1/3)x -r

Step-by-step explanation:

a perpendicular line has the slope of the line that it's perpendicular but its the negative reciprocal of it. So for ex: line 1 = 2x then the line perpendicular to it is -1/2x.

In this case, the slope is 3x. The line perpendicular to it therefore, should be -1/3x.

The problem states the line has the same y-intercept so it has to still be -r.

So the equation of the line perpendicular to y=3x-r with the same y-intercept is y=-(1/3)x -r

4 0
3 years ago
The perimeter of a rectangle is 90 centimeters. The length is 27 centimeters.
Kisachek [45]

Answer:

width=18cm

Step-by-step explanation:

perimeter= 2(l+b)

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b=18cm

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3 years ago
mary is preparing for her college entrance exams. in a practice test, she answered 12 problems in 30 minutes. at this rate, how
mariarad [96]
12 problems = 30 minutes
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Mary can respond 60 problems in 2 hours and 30 minutes/ 2 hours and half/ 150 minutes.

Hope this helps xx
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3 years ago
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Answer:

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