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3 years ago

How do you find the angle sum theorum?

Mathematics

2 answers:

Ira Lisetskai [31]3 years ago

7 0

The angle measures in any triangles add up to 180 degrees

stich3 [128]3 years ago

6 0

Angles measure in any triangles add up to 180 degrees and complement angles add up to 90

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The pool has 27 umbrellas, 6 of them are red, what fraction of umbrellas are red?

xz_007 [3.2K]

Answer:

2/9

Step-by-step explanation:

6/27 = 2/9

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3 0

3 years ago

Read 2 more answers

Please help me with this question!! I also need the steps

e-lub [12.9K]

Hi there!

$\large\boxed{x = \frac{\pi}{3} \text{ and } \pi}$

We are given:

cos(7x)cos(4x) = -1 - sin(7x)sin(4x)

Begin by moving all terms with variables to one side:

cos(7x)cos(4x) + sin(7x)sin(4x) = -1

The corresponding trig identity is cos(A - B). Thus:

cos(7x - 4x) = cos(7x)cos(4x) + sin(7x)sin(4x) = -1

cos(3x) = -1

cos = -1 at π, so:

3x = π

x = π/3

We can also find another solution. Let 3π = -1:

3x = 3π

x = π

Thus, solutions on [0, 2π) are π/3 and π.

8 0

3 years ago

Randomly selected statistics students participated in an experiment to test their ability to determine when 1 min (or 60 seconds

Marrrta [24]

Answer:

The correct option is:

A. We are 95% confident that the interval from 55.4 seconds to 61.2 seconds actually does contain the true value of μ.

Explanation:

In statistics, confidence interval is the interval estimate about the population parameter of interest at certain level of confidence like 95%. A 95% confidence interval gives us a range of values that we can be 95% confident contains the true mean of the population.

Therefore, the option A is correct

4 0

4 years ago

2x-4/5=4<br> plsss answer quick

nikdorinn [45]

Answer:

Step-by-step explanation:

$\frac{2x - 4}{5} =4$