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oksano4ka [1.4K]
3 years ago
9

PLEASE HELP ME I NEED THIS REALLY BAD

Mathematics
1 answer:
Galina-37 [17]3 years ago
5 0

Answer:

z=70, y=102

Step-by-step explanation:

180-110 = 70

so, z=70

99+89+70 = 258

360-258 = 102

so, y=102

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A random sample of 20 purchases showed the sample mean of $48.77 and the sample standard deviation s is $17.58. How large is the
laila [671]

Answer:

<h2>$5.03</h2>

Step-by-step explanation:

Given data          

Sample Mean (M):  $48.77  

Sample Size (n): 20

Standard Deviation (σ) :  $17.58

Confidence Level: 80%

 we know that z*-Values for 80% Confidence  Levels is 1.28

the expression for margin of error is given bellow\

MOE= z*σ/√n

We can now substitute into the expression and solve for the MOE as

MOE= 1.28*17.58/√20

MOE= 22.502/4.47

MOE= 22.502/4.47

MOE= 5.03

The margin of error for a 80 % confidence interval is $5.03

3 0
3 years ago
Write and solve a system of equations to find the value of each variable
ozzi

Answer:

Step-by-step explanation:

2x+5y=12

3x+4y=11

---------------

3(2x+5y)=3(12)

-2(3x+4y)=-2(11)

-----------------------

6x+15y=36

-6x-8y=-22

-----------------

7y=14

y=14/7=2

2x+5(2)=12

2x+10=12

2x=12-10=2

x=2/2=1

x=1, y=2. (1, 2)

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I just provided you an example of a system of equations and I already solved it for you.

3 0
3 years ago
An exponential function with base greater than 1 eventually shows rapid growth. True or false
Stella [2.4K]
True, it keeps getting multiplied by itself more and more
7 0
2 years ago
Find the Sine of angle A<br> 8/17<br> 8/15<br> 15/8<br> 15/17
Vlad [161]

Given:

In triangle ABC, AB = 30, BC = 16, AC = 34 and measure of angle B is 90 degrees.

To find:

The value of Sine of angle A.

Solution:

In a right angle triangle,

\sin\theta=\dfrac{Perpendicular}{Hypotenuse}

In the given triangle ABC,

\sin A=\dfrac{BC}{AC}

\sin A=\dfrac{16}{34}

\sin A=\dfrac{8}{27}

Therefore, the correct option is A.

7 0
3 years ago
2xy³ if x is 2 y is -3<br> give how to solve for brainliest :)
Rasek [7]

Answer:

-108

Step-by-step explanation:

2xy^3

x=2

y=-3

plug in

2*(2)*(-3)^3

2*2*(-27)

-108

6 0
2 years ago
Read 2 more answers
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