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jok3333 [9.3K]
3 years ago
9

Math pls help me?????????

Mathematics
2 answers:
Softa [21]3 years ago
7 0

Answer: A

Step-by-step explanation:

Paul [167]3 years ago
5 0

Answer: A) 0 divided by anything is 0 so its undefined

Step-by-step explanation:

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The ratio 30 in. To 9ft in simplest form
dangina [55]
Convert "inches" to "feet" here.     30 in        1 ft            30
                                                      --------- = --------- = ---------  ft
                                                          1          12 in           12

Now find the ratio of (30 ft / 12) to 9 ft:

30 ft
------ 
  12           30
====   = -----------    Reduce this fraction; one way would be to
 9 ft          12(9)       write 30/9 as 10/3:

  30            10
------- = ------------ = 5/18 (answer)
12(9)       12(3)
8 0
4 years ago
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PLEASEEEE HELPPPPPPP!!!!!
Brut [27]

To find S or T add them together:

3/5 + 1/3

Rewrite the fractions to have a common denominator

9/15 + 5/15 = 14/15

Answer: 14/15

4 0
3 years ago
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A professor wants to estimate the average time it takes his students to finish a computer project. Based on previous evidence, h
vova2212 [387]

Answer:

A sample size of 3 is required.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.96}{2} = 0.02

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.02 = 0.98, so Z = 2.054.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

Based on previous evidence, he believes that the standard deviation is approximately 3.6 hours.

This means that \sigma = 3.6

He would like to be 96% confident that his estimate is within 5 hours of the true population mean. Use RStudio to determine how large of a sample size is required without rounding any interim calculations.

The sample size needed is of n, and n is found when M = 5. So

M = z\frac{\sigma}{\sqrt{n}}

5 = 2.054\frac{3.6}{\sqrt{n}}

5\sqrt{n} = 2.054*3.6

\sqrt{n} = \frac{2.054*3.6}{5}

(\sqrt{n})^2 = (\frac{2.054*3.6}{5})^2

n = 2.19

Rounding up:

A sample size of 3 is required.

4 0
3 years ago
Volleyball Village sells pairs of volleyball kneepads in black and white. Last month, they sold 5 pairs of black kneepads for ev
pshichka [43]

Answer:

2250

Step-by-step explanation:

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225 x 10 = 2250

8 0
3 years ago
Which is one of the transformations applied to the graph of f(x) = x2 to change it into the graph of g(x) = 4x2 + 24x + 30?
daser333 [38]

Answer:

Changing g(x) to this form: a(x-h) + k, we have:

g(x) = 4 (x+3)^2 - 6

Comparing this to the original equation, f(x) = x^2, we have the following transformations:

The graph is widened.

The graph is shifted left 3 units.

8 0
3 years ago
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