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KIM [24]
4 years ago
11

Can it figure how to do this cosine out

Mathematics
1 answer:
Gnesinka [82]4 years ago
3 0

Answer:

  BC= 14.6

Step-by-step explanation:

The law of cosines tells you ...

  BC² = AB² +AC² -2·AB·AC·cos(A)

  BC² = 9² +12² -2·9·12·cos(87°) ≈ 213.695

  BC ≈√213.695 ≈ 14.6

The length of BC is about 14.6 units.

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What is the solution to the system of equations graphed below y=1/2x+2 y=-2x+-3
vladimir1956 [14]

Answer:

<h2>x = -2, y = 1</h2>

Step-by-step explanation:

given the system of equations y=1/2x+2 and y=-2x+-3, since the 2 equations are functions of y, we will equate both equations together and calculate the value of x as shown

1/2x+2 = -2x-3

x/2+2x = -3-2

5x/2 = -5

5x = -10

x = -10/5

x = -2

Substituting x = -2 into any of the equation to get the value of y we have;

y = -2(-2)-3

y = 4-3

y = 1

The solution to the system of equation (x, y) = (-2, 1)

4 0
4 years ago
Given a graph for the transformation of f(x) in the format g(x) = f(kx), determine the k value. two parabolas open up with f of
Sloan [31]

Answer:

I believe that the answer is k=4.

Step-by-step explanation:

Because in order for a new function to be narrower than its parent function, the absolute value of k must be greater than 1 (k > 1), and for a new function to open in the same direction as its parent function, it must be positive, that leaves with only four as our answer.

4 0
3 years ago
Is 8/5 proportional to 24/15 ?
DiKsa [7]

Hey there!

The answer to your question is, yes, it is

Given:

\frac{8}{5} and \frac{24}{15}

To see if they are equal, we can use cross products (see below for information about this, if you don't know what it is). Let us assume they are equal. This would mean that:

8*15=24*5

Let's solve it and see if it is true:

8*15=24*5

120=120

Therefore, they <em>are </em>proportional.

<u>Cross products</u>

WORD DEFINITION:

Given two fractions, you can take the numerator of the first fraction multiplied by the denominator of the second fraction and it should equal the denominator of the first fraction multiplied by the numerator of the second fraction.

ALGEBRAIC DEFINITION:

Given two fractions, \frac{a}{b} and \frac{c}{d}, a*d <em>should </em>equal to b*c

Hope it helps, and have a terrificly amazing day!

3 0
3 years ago
Can someone help ASAP please and thanks. It will be in the file.
Tema [17]

Answer:

if we’re finding area then it’s 33! Hope this helped!

4 0
3 years ago
Read 2 more answers
please help! A cheetah travels at a rate of 90 feet per second.The distance d traveled by the cheetah is a function of seconds t
Juliette [100K]
<h2><em>The equation would be d=90t because the input is 25 for t and multiply to get 2250 feet per second</em>. </h2>
6 0
4 years ago
Read 2 more answers
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