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Arada [10]
3 years ago
14

If you want to add or subtract fractions, what is the first thing you need to do?​

Mathematics
2 answers:
gregori [183]3 years ago
5 0

Answer:

take lowest common factor

Step-by-step explanation:

nataly862011 [7]3 years ago
3 0

Answer:

Find the least common denominator for both fractions and set up the fractions so they can both contain that same denominator.

Step-by-step explanation:

For example, let's say you want to add the fractions \frac{3}{4} and \frac{2}{7}.

First, you will want to find the least common demoninator.  Write out the multiples for both denominators originally given, in this case 4 and 7.  Let's go up to 4*10 and 7*10:

4: 4,8,12,16,20,24,28,32,36,40

7: 7,14,21,28,35,42,49,56,63,70

Se which number in both sets is the first number to be the same in both sets.  That will be your least common denominator.  In this case, the least comon denominator is 28.

To set the fractions right, you would need to multiply the first fraction, 3/4, by 7/7: \frac{3}{4}*\frac{7}{7}=\frac{21}{28}

Then, you would need to multiply the second fraction, 2/7, by 4/4: \frac{2}{7}*\frac{4}{4}=\frac{8}{28}

Now, since both fractions have a common deonminator now, you can add them togther and simplify afterwards if you need to:

\frac{21}{28}+\frac{8}{28}=\frac{29}{28}=1\frac{1}{28}

And that's it.

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3 years ago
Pls answer this with an explanation if you can pg3 pt12
faust18 [17]
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7 0
3 years ago
5. PLEASE HELP ME
Serga [27]

Answer:

7x=11

Step-by-step explanation:

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4 0
2 years ago
A city police officer using radar checked the speed of 26 cars as they were travelling down a city street and the data is given
pychu [463]

Answer: The distribution of the data set is positively skewed.

<u>Explanation: </u>

In order to see whether the given data set is symmetric, positively skewed or negatively skewed, we will find the mean, median and mode of the given data set.

For symmetric distribution, Mean = Median=Mode

For positively skewed distribution, Mean > Median>Mode

For negatively skewed distribution, Mean < Median

The mean of the given data set is given below:

Mean = \frac{27+23+22+38+43+24+25+23+22+54+31+30+29+48+27+25+29+28+26+33+25+21+23+34+20+23}{26}

                =\frac{753}{26}

                =28.96

Now, the Median is:

To find the median we need to sort the data in ascending order as:

20,21,22,22,23,23,23,23,24,25,25,25,26,27,27,28,29,29,30,31,33,34,38,43,48,54

Median=\left(\frac{N+1}{2} \right)^{th} item

                   =\left(\frac{26+1}{2}\right)^{th} item

                   =13.5^{th} item

                   =26+0.5 \times (27-26)

                   =26.5

\therefore Median = 26.5

The mode is the most frequently occurring observation. Therefore the mode is:

Mode=23

Since the Mean >Median>Mode, therefore the distribution of the given data set is positively skewed.


5 0
3 years ago
Please helppppppppppppp
Serggg [28]

Answer:

101

HOPE THIS HELPS

- Todo ❤️

Step-by-step explanation:

Suplemetary angles

180-79=101

4 0
2 years ago
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