All categories

2 years ago

Please HELP!!!!

Mathematics

1 answer:

MA_775_DIABLO [31]2 years ago

3 0

Answer: 184.08 l.y.

Step-by-step explanation:

Let the width of Orion's belt is x light year.

By cosine law,

$(x)^2 = (915)^2+(736)^2-2\times 915\times 736 cos3^{\circ}$

$(x)^2 = 837225+541696-1346880 cos3^{\circ}$

$(x)^2 = 837225+541696-1345034.14777$

$(x)^2 = 33886.8522298$

$x = 184.08381849\approx 184.08$

Thus, the width of the Orion's belt is 184.08 light year.

You might be interested in

Pleaseeee help!!! I will mark you as brainlinest for correct answer!!!!!

DaniilM [7]

A would be your answer
f(x) = 20 $( \frac{3}{5} ) ^{x}$

8 0

2 years ago

The following is a student’s work when solving for y. There is a mistake in the work. What is the mistake? What is the correct a

laila [671]

Answer:

Part 1

The mistake is Step 2: P + 2·x = 2·y

Part 2

The correct answer is

Step 2 correction: P - 2·x = 2·y

(P - 2·x)/2 = y

Step-by-step explanation:

Part 1

The student's steps are;

Step 1; P = 2·x + 2·y

Step 2: P + 2·x = 2·y

Step 3: P + 2·x/2 = y

The mistake in the work is in Step 2

The mistake is moving 2·x to the left hand side of the equation by adding 2·x to <em>P </em>to get; P + 2·x = 2·y

Part 2

To correct method to move 2·x to the left hand side of the equation, leaving only 2·y on the right hand side is to subtract 2·x from both sides of the equation as follows;

Step 2 correction: P - 2·x = 2·x + 2·y - 2·x = 2·x - 2·x + 2·y = 2·y

∴ P - 2·x = 2·y

(P - 2·x)/2 = y

y = (P - 2·x)/2

7 0

2 years ago

What is the coordinate?

faltersainse [42]

Remember that the equation of a circle is:
$(x - h)^{2} + (y - k)^{2} = r^{2}$
Where (h, k) is the center and r is the radius.
We need to get the equation into that form, and find k.

$x^{2} - 6x + y^{2} - 10y = 56$

Complete the square. We must do this for x² - 6x and y² - 10y separately.

x² - 6x
Divide -6 by 2 to get -3.
Square -3 to get 9. Add 9,
x² - 6x + 9

Because we've added 9 on one side of the equation, we have to remember to do the same on the other side.

$x^{2} - 6x + 9 + y^{2} - 10y = 65$

Now factor x² - 6x + 9 to get (x - 3)² and do the same thing with y² - 10y.

y² - 10y
Divide -10 by 2 to get -5.
Square -5 to get 25.
Add 25 on both sides.

$(x - 3)^{2}+ y^{2} - 10y + 25= 90$

Factor y² - 10y + 25 to get (y - 5)²

$(x - 3)^{2}+ (y - 5)^{2} = 90$

Now our equation is in the correct form. We can easily see that h is 3 and k is 5. (not negative because the original equation has -h and -k so you must multiply -1 to it)

Since (h, k) represents the center, (3, 5) is the center and 5 is the y-coordinate of the center.

7 0

2 years ago

I WILL MARK YOU BRAINLIEST!

guajiro [1.7K]

Answer:

the answer is 12 inches

every inche equals 15 feet from 30/2 then divide it by the total 180/15 which equals 12

3 0

2 years ago

Read 2 more answers

Please help on 7 to be marked the brainliest

sweet [91]

Answer:

D) 3.57%

Step-by-step explanation:

The percentage change is given by ...

percent change = ((new value) -(old value))/(old value) × 100%

= (3.19 -3.08)/3.08 × 100% = 0.11/3.08 × 100% = (11/3.08)% ≈ 3.57%

When dealing with percentages, you need to be clear about what number represents 100%, the reference value against which errors or changes are measured. Here, it is the π of the mug, 3.08.

7 0

2 years ago