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aev [14]
3 years ago
6

16n > 13n + 9- maths show your working

Mathematics
1 answer:
Rainbow [258]3 years ago
8 0

Answer:

Step-by-step explanation:

i have no idea soz babes

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A bag contains 5 black marbles, 9 white marbles, and 2 red marbles. One marble is to be chosen at random.
bulgar [2K]
2/16 because when you add all the marbles, you get 16 in total and there are 2 red marbles so there is a 2/16 chance of choosing one of the red marbles. If you want it simplified, it would be 1/8.
3 0
3 years ago
The mean income per person in the United States is $50,000, and the distribution of incomes follows a normal distribution. A ran
sergij07 [2.7K]

Answer:

Yes. There is sufficient eveidence to support  the claim that Wilmington resident's earn more than the national average

Step-by-step explanation:

Given the following;

\alpha=Significance \ Level=0.05\\n=10\\\bar X=60000\\\ s=sample\  \sigma=10000

#We set our hypothesis as:

H_o:\mu\leq 50000\\H_a:\mu>50000

The rejection region of either hypothesis:

P(t>t_o)=0.05, we determine the critical values for this probability in the T distribution table;

t=1.833

=>We reject for all values greater than 1.833, t>1.833.

#We now determine the value of the test statistic as:

t=\frac{\bar X-\mu_o}{s/\sqrt{n}}\\\\=\frac{60000-50000}{10000/\sqrt{10}}\\\\=3.1623

We find that:

t=3.1623>1.833,\ \ \ Reject \ H_o

Hence, there is sufficient eveidence to support  the claim that Wilmington resident's earn more than the national average.

4 0
3 years ago
PLEASE EXPLAIN BECAUSE A GIRL IS COMPLETELY LOST HERE
Afina-wow [57]

Hello!


To find the value of b, we need to use the Law of Sines. The law states,

sin A / a = sin B / b = sin C / c.


We are given these values: sin A = 55 degrees, side a = 8 cm, sin C = 82 degrees.


Since angle B is not given, we have to find it ourselves. We can find the measure of angle B by subtracting both the given angle values from 180 degrees because every triangle is equal to 180 degrees.


180 - 55 - 82 = 43 | The measure of sin B = 43 degrees.


sin (55) / 8 = sin (43) / b (multiply both sides by b)

0.10239... · b = 0.68199... (divide both sides by 0.10239...)

c = 6.6607...


The measure of side b is equal to about 6.7 centimeters.

3 0
3 years ago
Read 2 more answers
Can someone help me with this
Phantasy [73]
I pretty sure the answer would be B  :)

8 0
3 years ago
Read 2 more answers
Solve the systems of equations- x-y=4, 2x-5y=2 (6,2) (-6,2). (2,6). (2,-6)
weqwewe [10]

Answer:

its 4

Step-by-step explanation:

2+2 = 4 hardest question of all time but i know it

5 0
3 years ago
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