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photoshop1234 [79]
2 years ago
11

Choose the expression that represents "three less

Mathematics
1 answer:
Anna35 [415]2 years ago
5 0

Answer:

none of your options are right

Step-by-step explanation:

<h2>Three less than seven times a number:</h2>

<u><em>three : 3, less than : (-), seven : 7, times : (multiplication symbol), a number : (x)</em></u>

<u><em>the answer is : 3 - 7 (x)</em></u>

                       <u><em>: 3-7x</em></u>

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Ms Hernandez has $100 to spend on parking at admission to the zoo the parking will cost seven dollars and the admission tickets
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7+ 15.50X=100
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8 0
3 years ago
A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random 275 sample of machines is taken, and
Dominik [7]

Answer:

Following are the solution to the given question:

Step-by-step explanation:

95\% Confidence Interval for both the percentage of all x-ray machines

p = the machinery's share is not working:

= \frac{228}{275}\\\\ = 0.829

\text{Margin of Error} = Z_{(\frac{\alpha}{2})} \times \sqrt{( p \times (1-p)}{n})

                         = 1.96 \times \sqrt{(0.829 \times \frac{0.171}{275})} \\\\= 1.96 \times 0.023 \\\\= 0.045

Lower 95\% Confidence interval = p - error margin = 0.829 - 0.045 = 0.784

Upper 95\% Confidence Interval = p + error margin= 0.829 + 0.045 = 0.874

So, 95\% Confidence Interval = ( 0.78 , 0.87 )

4 0
3 years ago
PICTURE ABOVE !!! <br> find the length of XZ <br> PLEASE HELP !!
slamgirl [31]

Answer: 60

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4 0
3 years ago
What is 7 3/8 + 2 1/8
Ksivusya [100]

Answer:

9.5

Step-by-step explanation:

3 0
3 years ago
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What is x2+5x+6 <br> ?????
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Answer:

try A!

Step-by-step explanation:

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