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Thepotemich [5.8K]
3 years ago
13

Distribute 7 x (2+2x)

Mathematics
1 answer:
True [87]3 years ago
4 0
28 x because parenthesis first and you can’t do 2 + 2x so 7x times 2 is 14x and 7 times 2x is 14x
You might be interested in
-3 is a solution to 4x + 2 < -6
adelina 88 [10]

Answer:

-3 is a solution

Step-by-step explanation:

4x+2 < -6

subtract 2 from each side

4x < -8

divide by 2

x < -2

-3 is a solution


3 0
3 years ago
What is the answer to 5x-11=34
Talja [164]

Answer:

<h2>x = 9</h2>

Step-by-step explanation:

5x-11=34\qquad\text{add 11 to both isdes}\\\\5x-11+11=34+11\\\\5x=45\qquad\text{divide both sides by 5}\\\\\dfrac{5x}{5}=\dfrac{45}{5}\\\\x=9

8 0
3 years ago
Read 2 more answers
The height of 44 students (in centimeter) are presented in the frequency distribution below. Complete the table, and then find t
JulijaS [17]

Given:

The height of 44 students (in centimeter) are presented in the given frequency distribution.

To find:

The median of the given data.

Solution:

The given intervals are inclusive first make the intervals exclusive by adding 0.5 in upper limit and by subtracting 0.5 from the lower limit.

The complete frequency distribution table is shown below:

Height              Frequency           L                            <cf

182 - 188                  1                  181.5 - 188.5            44

175 - 181                   3                 174.5 - 181.5             43

168 - 174                  6                 167.5 - 174.5            40

161 - 167                 15               160.5 - 167.5            34   Median class

154 - 160                 12                153.5 - 160.5           19

147 - 153                   4                146.5 - 153.5             7

140 - 146                   3                139.5 - 146.5             3

We have, n=44.

\dfrac{n}{2}=\dfrac{44}{2}

\dfrac{n}{2}=22

The 22th term is include in the class 160.5 - 167.5 because is cf is greater than 22 but the cf of o preceding class is less than 22. So, it is the median class is 160.5 - 167.5.

Formula for median:

Median=l+\dfrac{\dfrac{n}{2}-cf}{f}\times h

Where, l is the lower limit of median class, cf is the cumulative frequency of preceding class, f is the frequency of median class and h is the size of the class.

Now, l=160.5,f=15,cf=19,h=7.

Median=160.5+\dfrac{22-19}{15}\times 7

Median=160.5+\dfrac{3}{15}\times 7

Median=160.5+1.4

Median=161.9

Therefore, the median of the given data table is 161.9.

3 0
3 years ago
3x - y = 7
mixas84 [53]
-3x = -3 because you would multiply one of the equations by -1 to eliminate y.
5 0
3 years ago
In both of the problems where would you put parentheses to make it statement true?
Darina [25.2K]
In the first one it would be (21-8)-6=7.
and in the second one it would be 21-(8-6)=19
5 0
3 years ago
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