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Dmitrij [34]
3 years ago
13

Maria does weightlifting for 30 seconds and then aerobics for 60 seconds. She repeats this 10 times. If she does not take any br

eaks, how many minutes does she exercise?
Mathematics
2 answers:
olga2289 [7]3 years ago
5 0
It took 15 minutes !!
VikaD [51]3 years ago
3 0

Answer:

15 minutes

Step-by-step explanation:

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A student's grade for the four quarters are 95, 83, 91, and 85. What does the student need to earn on the final exam to have an
gulaghasi [49]

Answer:

The least score the student can get is 71 to get an overall B average at the end of the year.

Step-by-step explanation:

Let the score she needs to get be = x

We now have to take the mean of all the five subjects <em>(including x)</em> and equate it to the least score she can have to get a B grade.

Let us take the least score the student needs to get a B grade to be 85

Mean of all 5 scores =

\frac{95+83+91+85+x}{5}=85

\frac{354+x}{5} =85

354+x = 425

x = 71

The least score the student can get is 71 to get an overall B average at the end of the year.

3 0
3 years ago
HELP QUICK!!!!!!! ASAP!
sweet-ann [11.9K]

Answer:

52 X 60 equals 3120, divide that by 100, to get 31.20, and then do 52.00-31.20 to 20.8. plus sales tax, would equal, 20.8 X 6.25% = 1.3. add that onto the original answer to get the final answer, 22.1. Hope this helps! :)

5 0
3 years ago
Read 2 more answers
Please list the factors thanks :)
ICE Princess25 [194]
The only factors are 1 and 29
5 0
3 years ago
Read 2 more answers
Which of the following shows all of the factor pairs of 28?
kow [346]

The factor pairs of a number when multiplied give the original number.

Therefore, all the factor pairs of 28 are:

\begin{gathered} 1\times28; \\ 2\times14; \\ 4\times7 \end{gathered}

The correct choice is the first one

4 0
1 year ago
Suppose that you are conducting a survey on how many students have blue eyes in each first period classroom at Garfield Middle s
rusak2 [61]

Answer:

  • <u>The correct statement is the first one: </u><u><em>The number of blue-eyed students in Mr. Garcia's class is 2 standard deviations to the right of the mean</em></u><em> </em>

<em />

Explanation:

To calculate how many<em> standard deviations</em> a particular value in a group is from the mean, you can use the z-score:

      z-score=(x-\mu )/\sigma

Where:

  • z-score is the number of standard deviations the value of x is from the mean
  • \mu  is the mean
  • \sigma  is the standard deviation

Substitute in the formula:

       z-score=(10-6)/2=4/2=2

Which means that <em>the number of blue-eyed students in Mr. Garcia's class is 2 standard deviations</em> above the mean.

Above the mean is the same that to the right of the mean, because the in the normal standard probability graph the central value is Z = 0 (the z-score of the mean value is 0), the positive values are to the right of the central value, and the negative values are to the left of the central value.

Therefore, the correct statement is the first one: <em>The number of blue-eyed students in Mr. Garcia's class is 2 standard deviations to the right of the mean, </em>

4 0
3 years ago
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