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3 years ago

8

The diagram represents a reduction of a triangle by using a scale factor of 0.8.

2 answers:

Lelechka [254]3 years ago

7 0

Answer:

B 4.8 inches

Step-by-step explanation:

The scale factors are used to convert a figure into another one with similar characteristics but different lengths, in this example is a triangle, and in order to calculate the measure of the height you just have to multiply the original height by the scale factor:

lukranit [14]3 years ago

4 0

Its C 4.8 because I did it

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Can anybody tell me what’s going on here?

masha68 [24]

Step-by-step explanation:

We are given a theta degree measure of sin in a specific interval. We are asked to find half of that degree measure.

The interval it ask us to find it in is between 2 pi and 5 pi over 2.

That is 360 degrees to 450 degrees. If you use reference angles, that is between the 0 degrees and 90 degrees. So that means our measure is going to be in the 1st quadrant.

Replace x with theta

$\sin( \frac{x}{2} ) = + - \sqrt{ \frac{1 - \cos(x) }{2} }$

We dont know cos x but we can use the pythagorean trig theorem to find cos x.

$\sin {}^{2} (x) + \cos {}^{2} (x) = 1$

$\sin {}^{2} ( \frac{4}{5} ) + \cos {}^{2} (x) = 1$

$\frac{16}{25} + \cos {}^{2} (x) = 1$

$\cos {}^{2} (x) = 1 - \frac{16}{25}$

$\cos {}^{2} (x) = \frac{9}{25}$

$\cos(x) = \frac{3}{5}$

Cosine in 1st quadrant is positive so 3/5 is cos x.

Replace 3/5 for cos x.

$+ - \sqrt{ \frac{1 - \frac{3}{5} }{2} }$

$+ - \sqrt{ \frac{2}{10} }$

The answer is

$+ - \sqrt{ \frac{2}{10} }$

7 0

3 years ago

Owen uses colored pencils on his homework assignment. His red pencil is 12.195 centimeters long. His blue pencil is 9.13 centime

Reptile [31]

Answer:

21.325 is the correct answer

<h3></h3><h3>please gimme brainliest :))!!</h3>

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4 years ago

Read 2 more answers

What is the 10th term of the geometric sequence 400, 200, 100...?

Vsevolod [243]

ANSWER

$a_ {10} = \frac{25}{32}$

EXPLANATION

The given geometric sequence is

400, 200, 100...

The first term is

$a_1=400$

The common ratio is

$r = \frac{200}{400} = \frac{1}{2}$

The nth term is

$a_n=a_1( {r}^{n - 1} )$

We substitute the known values to get;

$a_n=400( \frac{1}{2} )^{n - 1}$

$a_ {10} =400( \frac{1}{2} )^{10 - 1}$

$a_ {10} =400( \frac{1}{2} )^{9}$

$a_ {10} = \frac{25}{32}$

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3 years ago

A box contains 10 book covers: 5 red, 2 blue, and 3 yellow. If a student randomly selects one book cover, what is the probabilit

IgorC [24]

The probability is 5+2/10= 7/10

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3 years ago

(3x +2)<br> 2x<br> (x, sol<br> (2x+1001

eduard

Answer:

Hope it helps you

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3 years ago