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Snowcat [4.5K]
3 years ago
13

How do you solve question 16?

Mathematics
1 answer:
DiKsa [7]3 years ago
4 0
You know that cos(x) = CA/BA = 9/14
.. x = arccos(9/14) ≈ 50° . . . . . . . . selection 3
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In triangle XYZ, m∠Z > m∠X + m∠Y. Which must be true about △XYZ?
MissTica
It must be an obtuse triangle

4 0
3 years ago
Select the correct answer.
galina1969 [7]

Answer:

<h2>C. 8 + 3i</h2>

Step-by-step explanation:

(9 + 6i) - (1 + 3i) = 9 + 6i - 1 - 3i = (9 - 1) + (6i - 3i) = 8 + 3i

8 0
3 years ago
3. Which statements about the line that passes through (-2, 0) and (2, -4) are true?
diamong [38]

Answer:

B, C, and D.

Step-by-step explanation:

Let's go through each answer choice.

A: To find the slope of a line from two points, we use this formula: (y_2-y_1)/(x_2-x_1). Plugging in the values (-2,0) and (2, -4), we get:

  • (-4-0)/(2+2)
  • -4/4
  • -1

Because option A says the slope is 1, but we got -1, option A is false.

B: To find the y-intercept, we use this formula: b = y_1 - m * x_1

  • b = 0 -(-1) * (-2)
  • b = 1 * (-2)
  • b = -2  

Since we know the value of b is the y-intercept, we could write the y-intercept as (0,-2). Therefore, option B is true.

C: The equation of a line (in slope-intercept form) is y = mx + b, where y - y-coordinate, m = slope, x = x-coordinate, and b = y-intercept. Since we already solved for the y-intercept and slope, let's plug in those values:

  • y = mx +b
  • y = -x -2

As you can see, the equation we got here matches the one in option C, meaning it's true.

D: We know that a point is written like this: (x, y). If the x-coordinate is not zero but the y-coordinate is, then it's the x-intercept. Since the question says that (-2,0) is one of the points the line passes through, and option D says that the x-intercept is (-2,0), it's true.

8 0
3 years ago
Read 2 more answers
I don’t understand this question.
Anastaziya [24]
<span>In a triangle the sum of two sides is always greater than the third side.

5.6-4.0 < x < 5.6+4.0
1.6 < x < 9.6  </span>← answer
4 0
3 years ago
What is 6,400,000 written in scientific notation?
Arlecino [84]

Answer:

B

Step-by-step explanation:

6.4 × 1000000 is 6,400,000

10⁶ = 1000000

8 0
3 years ago
Read 2 more answers
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