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lidiya [134]
3 years ago
14

Trigonometry please help!

Mathematics
1 answer:
Valentin [98]3 years ago
4 0

See the attached picture:

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Helpp<br> 11 7/8 + 4 1/2
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Answer:

16.375 or 16 3/8

Step-by-step explanation:

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3 years ago
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We use the t distribution for the statistical inference of the population mean when the underlying population standard deviation
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Answer:

Step-by-step explanation:

Since population std deviation is not  known, we use t critical value for testing of hypothesis.

a) 90% conf level when n =28

df = 27, t critical = 1.706

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df =27 and t critical = 2.052

c) 90% and 15

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d) 95% and n =15

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3 years ago
Solve the system of equations
insens350 [35]

Answer:

x = 3, y = 1 is the solution of the given system.

Step-by-step explanation:

Here, the given system of equations is:

y = -x  + 4   ...... (1)

y = x - 2     ..........  (2)

Now, to find the solution of the system, SUBSTITUTE the value of y from equation  (1) in to the equation (2). We get ,

y = x - 2   ⇒   -x  + 4  = x - 2  ( as from (1), y = -x + 4)

or,  -x -x = -2 -4

or, - 2 x = -6 ⇒   x = 6/2  = 3

or, x = 3

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Hence, x = 3, y = 1 is the solution of the given system.

5 0
3 years ago
I NEED PART B AND C DONE I DID PART A, PLEASE HELP AND TELL ME WHAT PART YOU ARE SOLVING ALSO LOTS OF POINTS!!!
RideAnS [48]

Answer:

(8,10) is not a solution

Step-by-step explanation:

Cuz it’s not on both inequality shaded part but just one of them and also when we substitute one is true and the other one is false

2x + y _< 8

2(8) + 10 _< 8

18 + 10 _< 8

28 _< 8 false

X + y _> 4

8 + 10 -> 4

18 _> 4 true

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3 years ago
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A jewelry store is selling a set of 4 pairs of gemstone earrings for $58, including tax. Neva and three of her friends want to b
Mnenie [13.5K]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
The  solve a multiplication equation to find out how much each person should pay. is <span>4g=$58, g=$14.50</span>

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3 years ago
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