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aliya0001 [1]
3 years ago
10

Solve for x. Round to the nearest tenth, if necessary.

Mathematics
1 answer:
natka813 [3]3 years ago
8 0

Answer:

25.5

Step-by-step explanation:

first find angle E.

remember, all angles in a triangle always add up to 180 degrees.

E = 180 - 90 - 20 = 70 degrees

now we use the law of sines.

ED/sin(20) = DC/sin(70) = EC/sin(D)

EC = x

sin(D) = sin(90) = 1

24/sin(70) = x/1 = x

x = 25.5

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Rasek [7]

Answer:

Let x = no. of books

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Cost = 12.50x + 54150

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Revenue = 25x

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Rev = cost

25x = 12.5x + 54150

25x - 12.50x = 54150

 

12.5x = 54150

x = 54150%2F12.5

x = 4332 books need to be sold to cover production costs

:

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Check:

c = 12.50(4332) + 54150

c = 54150 + 54150

c = 108300

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r = 108300

Step-by-step explanation:

4 0
3 years ago
!!!PLEASE HELP!!!
Lunna [17]

Answer:

I believe the answer is 24

Step-by-step explanation:

a=1/2 bh

b=8

h=6

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10 is irrelevant

5 0
3 years ago
Pls help me this is a huge packet
Darina [25.2K]

Is there only choices A and B?

From the choices I can see you don’t even have to do any work. The equation starts with (y =). This indicates you will be working with the y intercept. The y intercept is simply where the line crosses on the y axis. In this graph, the y intercept is 2.5. Out of your choices (A and B that I can see) only one contains + 2.5.

B is your answer UNLESS there are choices c and d that are cut out.

4 0
3 years ago
A study of five hundred adults found that the number of hours they spend on social networking sites each week is normally distri
Nata [24]
Margin of error formula:
ME = z * (Sigma) / √ n
z = 1.96 for a 95 % confidence interval;
Sigma = 3 ( the population standard deviation )
n = 500
ME = 1.96 * 3 / √500 =
= 1.96 * 3 / 22.36 =
= 5.88 / 22.36 = 0.263
Answer:
The margin error for a 95% confidence interval is 0.263.
6 0
3 years ago
Y=2x - 1 and y= -x + 5
kumpel [21]

Answer:

X=2

Step-by-step explanation:

When x is 2, y=3 for both equations

7 0
3 years ago
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