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Kay [80]
3 years ago
13

Use graph to answer question

Mathematics
1 answer:
forsale [732]3 years ago
6 0

Given:

A figure of a right angle triangle.

To find:

The length of BC.

Solution:

In a right angle triangle,

\tan \theta =\dfrac{Perpendicular}{Base}

In the given triangle,

\tan A =\dfrac{BC}{AC}

\tan 23^\circ =\dfrac{BC}{6}

0.42447\times 6 =BC

2.54682 =BC

Approximate the value to the nearest hundredth.

BC\approx 2.55

Therefore, the measure of side BC is 2.55 units.

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it takes a lady 26 minutes to travel 3 km by walking the first part at 6 km per hour and running the second part at 10 km per ho
Natasha2012 [34]

Answer:

78 meter 360meters 600 meters

3 0
3 years ago
Write an equation perpendicular to x-4y=20 that passes through the point 2,-5
marshall27 [118]

Answer:

  4x +y = 3

Step-by-step explanation:

Perpendicular lines have slopes that are the negative reciprocals of one another. When the equation of the line is written in standard form like this, the equation of the perpendicular line can be written by swapping the x- and y-coefficients and negating one of them. Doing this much would give you ...

  4x +y = (constant)

Note that we have chosen to make the equation read 4x+y, not -4x-y. The reason is that "standard form" requires the leading coefficient to be positive.

Now, you just need to make sure the constant is appropriate for the point you want the line to go through. So, it needs to be ...

  4(2) +(-5) = constant = 3

The line of interest has equation ...

  4x + y = 3

3 0
3 years ago
2/10 clear and 18/100 orange. The rest are red and blue. There are 2 more red marbles than blue marbles. What fraction represent
romanna [79]

Answer:

33/100 red, 29/100 blue

Step-by-step explanation:

2/10=20/100

20+18=38

38/100 orange/clear marbles

100-38=62

62 red/blue marbles

62/2=31

31 blue, 31 red

"There are 2 more red marbles than blue marbles."

31-2=29

31+2=33

33/100 red, 29/100 blue.

4 0
3 years ago
Find all solutions to the equation.<br><br> cos2x + 2 cos x + 1 = 0
yanalaym [24]
For cos(2x) * (2cos(x) + 1) = 0, use the double angle identity for cos(2x), which is cos^2 x - sin^2 x = cos^2 x - (1-cos^2) = 2cos^2 x - 1.
So we have (2cos^2 x - 1)(2cos x + 1) = 0. So 2cos^2 x -1 = 0 or x = 0 and 2pi.
For 2sec^2 x + tan^2 x - 3 = 0, use the identity sec^2 x = tan^2 x + 1, so we have
2(tan^2 x + 1) + tan^2 x - 3 = 0 or
<span>2tan^2 x + tan^2 x - 1 = 0 or
</span>3 tan^2 x = 1.

So x = pi/2, pi/2 + pi = 3pi/2.

5 0
3 years ago
PLS HELP WILL GIVE BRANLIEST PLUS 15 POINTS
Travka [436]
The answer is B since he bought 4 in all it is x+y =4 . x=dvd y= blue ray discs .

so 2x + 5y =11
2x since dvds are $2
5y since blue ray discs are $5
11 since that’s the total
6 0
3 years ago
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