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pashok25 [27]
4 years ago
7

When subtracting 12 from three times the sum of 8 and a number, you get half of that number. Write and solve the equation for th

is sentence.
Mathematics
1 answer:
vampirchik [111]4 years ago
5 0

Answer:

equation:  3(8 + x) - 12 = 1/2 x      

answer:  -4.8

Step-by-step explanation:

3(8 + x) - 12 = 1/2 x

24 + 3x - 12 = 1/2 x

12 + 3x = 1/2 x

12 = - 2 1/2 x

- 4.8 =  x

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What do you know about the side lengths and trigonometric ratios in special right triangles
TEA [102]

Explanation:

This looks like an essay question with no right answer.

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There are two "special" right triangles:

  isosceles 45°-45°-90° triangle with sides in the ratios 1 : 1 : √2

  30°-60°-90° triangle with sides in the ratios 1 : √3 : 2

These side lengths give rise to the trigonometric ratios shown below for angles with 30°, 45°, or 60° as reference angles.

6 0
4 years ago
When commercial aircraft are inspected, wing cracks are reported as nonexistent, detectable, or critical. The history of a parti
Kamila [148]

Answer:

0.226

Step-by-step explanation:

Given that:

No wing crack (x) = 70%

Detectable wing crack (y) = 25%

Critical wing crack (z) = 5%

Number of samples (n) = 5

Probability that atleast a plane has critical crack:

1 - p(no critical crack)

Using the multinomial distribution calculator :

P(5,0,0) + p(4,1,0) + p(3,2, 0) + p(2,3,0) + p(1,4,0) + p(0,5,0)

From the calculator :

P(5,0,0) + p(4,1,0) + p(3,2, 0) + p(2,3,0) + p(1,4,0) + p(0,5,0) = 0.7741

1 - 0.7741 = 0.2259

= 0.226

7 0
3 years ago
In class A, John got 85 for his first test John's class mean was 75 and standard deviation was 5. In class B, Kathy got 80 in he
ivanzaharov [21]

Answer:

b. Kathy

Step-by-step explanation:

We compare each of their score by how far away from the mean when in term of the standard deviation. Using the following formula

\frac{x - \mu}{\sigma}

For John he is (85 - 75)/5 = 2.

For Kathy she is (80 - 50)/10 = 3.

Since Kathy is 3 standard deviation better than her class' average, while John is only 2's. We conclude that Kathy did better.

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3 years ago
Write a real word problem that can be represented by the equation 3/4c=21
svetlana [45]

How many 3/4 cups of milk would be needed to make 21 cups of milk for a large recipe?

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3 years ago
Please answer the question in the pic and show your work
Ludmilka [50]
The question is too small but make a bigger photo and I’ll answer it
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3 years ago
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