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Svet_ta [14]
3 years ago
9

To solve the system of linear equations 8x+ by - 18 and 6x+y=-2 by using the linear combination method, Amos decided that he sho

uld first multiply the second equation by -5 and then add the two equations together to eliminate the y terms. His
calculations are as shown. Amos’s solution is (2,-14). What did he do wrong?
Mathematics
1 answer:
Citrus2011 [14]3 years ago
5 0
You must first the dynamic aim type first then reverse and lock in.
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The question is attached
DerKrebs [107]

cos(A - B) = cos A cos B + sin A sin B

In this case, A is \frac{\pi }{3} and B is \frac{\pi }{5}, so:

  cos\frac{\pi}{3} cos\frac{\pi}{5} +sin\frac{\pi }{3} sin\frac{\pi }{5} =cos(\frac{\pi}{3} -\frac{\pi}{5} ) = cos\frac{2\pi}{15}

Hope that helps!

5 0
2 years ago
What is the slope of the line y=-2/3x+3
Solnce55 [7]
\left[y \right] = \left[ 3+\frac{\left( -2\right) \,x}{3}\right][y]=[3+​3​​(−2)x​​]
6 0
4 years ago
1. What is the length of XU?<br> X<br> U<br> Y<br> 36 in<br> V<br> Z<br> W<br> 23 in
mixer [17]

Answer: 49 in

Step-by-step explanation:

  • [23 + XU]/2 = 36 [trapezoid midsegment theorem]
  • 23 + XU = 72 [multiply both sides by 2]
  • XU = 49 [subtract 23 from both sides]
7 0
2 years ago
Help ASAP 2 questions!!!!!! <br> 20 point (10 for each hopefully) <br> 1<br> 2
Westkost [7]

Answer:

Step-by-step explanation:

1. We aren't worried about the area of the base, so the area is the area of the 4 triangles.  Each triangle has an area of half the base times the height.

A = 4 (½ bh)

A = 2 bh

Given b = 6 and h (the height of the triangle, not the pyramid) = 5:

A = 2 (6) (5)

A = 60 ft²

2. This time, we want to include the area of the rectangular base, so:

A = b₁b₂ + 2 (½ b₁h₁) + 2 (½ b₂h₂)

A = b₁b₂ + b₁h₁ + b₂h₂

Given b₁ = 78 m, b₂ = 50 m, h₁ = 52 m, and h₂ = 60 m:

A = (78) (50) + (78) (52) + (50) (60)

A = 10,956 m²

5 0
3 years ago
Probability and Likelihood
STatiana [176]

The probability that the next elk caught would be unmarked as a fraction is 24/25.

The probability that the next elk caught would be unmarked as a decimal is 0.96.

The probability that the next elk caught would be unmarked as a percentage is 96%.

<h3>What is the probability?</h3>

Probability is used to determine the likelihood that an event would occur.  The chances of the event happening lie between 0 and 1.

The probability that the next elk caught would be unmarked  = total number of unmarked elks / total number of elks

(5625 - 225) / 5625 = 5400 / 5625 = 24/25 = 0.96 = 96%

Here is the rest of the question:

What is the probability of the next elk caught in the park being unmarked? Write the probability as a fraction, a decimal number, and a percentage.

To learn more about probability, please check: brainly.com/question/13234031

#SPJ1

6 0
2 years ago
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