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Deffense [45]
2 years ago
6

50 divided by 56 please answer much needed

Mathematics
1 answer:
svetoff [14.1K]2 years ago
8 0
It’s 0.892857 if 50 goes in first
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Find an exact value. Cos 75° negative square root of six plus square root of two quantity square root of six minus square root o
ehidna [41]

Answer:

√2(√3 - 1)/4

Step-by-step explanation:

To find an exact value for Cos75°, we use the compound angle formula. Since 75° = 45° + 30°, Cos75° = Cos(45° + 30°).

Using Cos(A + B) = CosACosB - SinASinB where A = 45° and B = 30°,  

Cos75° = Cos(45° + 30°) = Cos45°Cos30° - Sin45°Sin30°

Now Cos45° = Sin45° = 1/√2 = √2/2, Cos30° = √3/2 and Sin30° = 1/2.

Substituting these values into the above equation, we have

Cos75° = Cos(45° + 30°)

= Cos45°Cos30° - Sin45°Sin30°

= √2/2 × √3/2 -  √2/2 × 1/2

= √6/4 -√2/4

= √2(√3 - 1)/4

6 0
3 years ago
the distance d a train travela varies directly with the amount of time t that has elapse since departure. If the train travela 4
antiseptic1488 [7]
475/9.5 x4 = 200miles in 4hrs
7 0
3 years ago
Who do you solve y= -5/2x-7
Serhud [2]

Answer:

To solve the equation y = -5/2x - 7, we can first multiply both sides of the equation by 2x + 7, which is the denominator of the fraction on the right-hand side. This gives us the equation 2xy + 7y = -5, which we can rearrange to isolate the variable y on one side of the equation. Dividing both sides of the equation by 2x + 7, we get y = -5 / (2x + 7). This is the solution to the original equation.

Step-by-step explanation:

4 0
1 year ago
Read 2 more answers
The World Health Organization is planning a study of the average weight gain of Europeans in the last 5 years. Scientists from t
jeyben [28]

Answer:

B and D

Step-by-step explanation:

Options are

A. Their confidence interval would be less likely to capture the sample mean.

B. The probability of selecting a sample which doesn't capture the true value of μ would be 10% rather than 5% if they decide to calculate a 90% confidence interval rather than a 95% confidence interval from the sample they will select.

C. They would increase the margin of error of their confidence interval if they calculated a 90% rather than a 95% confidence interval.

D. They would decrease the margin of error of their confidence interval if they calculated a 90% rather than a 95% confidence interval.

A. Confidence interval is pivoted around mean. So this is an incorrect option.

B. 90% sample values around mean will be included in case of 90% confidence interval  and 95% sample values  around mean wil be included in case of 95% confidence interval. So this option is correct

C. Margin of error increases with increase in confidence interval as likelihood of a sample value deviating from mean increases. So this is incorrect.

D. same explanation as above

6 0
3 years ago
A plane travels 1500 yards before lifting off the ground. If the plane continues on the
Ierofanga [76]

The height of the plane when it gets to the tower would be 600 yards, which is greater than the height of the tower. Hence, <em>"the plane clears the tower with about 6 yards to spare." </em>

<u>Given</u><u> </u><u>the</u><u> </u><u>Parameters</u><u> </u><u>:</u>

  • <em>Initial distance traveled = 1500</em>
  • <em>Yards to control tower = 600</em>
  • <em>Height of control tower = 198 feets = (198×3) = 594 yards </em>

If the rate of ascent of the airplane is proportional to the distance traveled, that is (1 yard length = 1 yard height gained).

Then after traveling 600 yards to the position of the control tower, then the height of the plane would be 600 yards

<u>Difference in height</u> :

  • <em>Height of plane - Height of tower</em>

(600 yards - 594 yards) = 6 yards

Therefore, the most appropriate Statement is that, "<em>the</em><em> </em><em>plane</em><em> </em><em>clears</em><em> </em><em>the</em><em> </em><em>tower</em><em> </em><em>with</em><em> </em><em>about</em><em> </em><em>6</em><em> </em><em>yards</em><em> </em><em>to</em><em> </em><em>spare</em><em>.</em><em>"</em><em> </em>

Learn more : brainly.com/question/25311632

7 0
2 years ago
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