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Elza [17]
4 years ago
9

What numbers come next in the pattern?? 1, -3, 9, -27

Mathematics
2 answers:
Gemiola [76]4 years ago
5 0

Answer:

81.

Step-by-step explanation: The pattern in this scenario would be multiplying the previous number by -3. (1 x -3 = -3, -3 x -3 x 9, etc.). Using this information, we know that multiplying the last number (27) by -3 would be the correct equation, yielding 81. Hope this helps!

grin007 [14]4 years ago
3 0

Answer:

81

Step-by-step explanation:

You r multiplying by three's

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Solve a triangle when A=15° B=113° and b=7?
JulsSmile [24]

Let us draw a triangle ABC with A=15° ,B=113° and b=7.

Please see the attached image.

We know that the sum of interior angles of a triangle is 180 degrees. Thus, we have

A+B+C=180\\
\\
15+113+C= 180\\
\\
C=62^{\circ}

Apply Sine rule in the triangle ABC, we get

\frac{a}{\sin 15}= \frac{7}{\sin 113}\\
\\
a=\frac{7 \sin 15}{\sin 113}\\
\\
a=1.97\\
\\
\text{Again apply sine rule, we get}\\
\\
\frac{c}{\sin 62}= \frac{7}{\sin 113}\\
\\
c=\frac{7 \sin 62}{\sin 113}\\
\\
c=6.71

Therefore, we have

a=1.97\\
c=6.71\\
C=62^{\circ}


4 0
3 years ago
The sum of two numbers is 2. Their difference is -16. What is the first number?
Helen [10]

Answer: The first number is 4

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Also, since the difference of the two numbers is two, then x - y = 2

Since x - y = 2, another way to write that is x = y + 2 and since x is exactly the same as y + 2, we can plug in "y + 2" in place of x in the first equation (x + y = 10) to get (y + 2) + y = 10. Then we solve this equation by combining like-terms.

2y + 2 = 10

2y = 8

y = 4

Since x = y + 2, x = 4 + 2 or x = 6

I hope this helped you!

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I think its 1.56

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