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muminat
2 years ago
10

2(4x + 3) = 2(18 - x)

Mathematics
2 answers:
almond37 [142]2 years ago
5 0
The answer is x=3 hope this helps
Jlenok [28]2 years ago
3 0

Answer:

x = 3

Step-by-step explanation:

2(4x + 3) = 2(18 - x) \\ 8x + 6 = 36   -   2x \\ 8x  + 2x = 36 - 6 \\  10x = 30 \\ x =  \frac{30}{10}  \\ x = 3

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June will spin the arrow on the spinner 5 times. What is the probability that the arrow will stop on A, then B, then C, then D,
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Vikentia [17]

Given:

Total number of students = 20

The marks of the students are 40, 22, 36, 27, 30, 12, 15, 20, 25, 31, 34, 36, 39, 41, 43, 48, 46, 36, 37 and 40.

To find:

The frequency distribution table with class size 10.

Solution:

We have, the marks of 20 students.

40, 22, 36, 27, 30, 12, 15, 20, 25, 31, 34, 36, 39, 41, 43, 48, 46, 36, 37, 40

Here,

Minimum value = 12

Maximum value = 48

We nee class intervals of size 10. So, the required class intervals are 10-20, 20-30, 30-40, 40-50. In these intervals, lower limit is excluded but the upper limit included.

The required frequency distribution table is

Class intervals      Marks                                                  Frequency

10-20                    12, 15                                                            2

20-30                   22, 27, 20, 25                                             4

30-40                   36, 30, 31, 34, 36, 39, 36, 37                      8

40-50                   40, 41, 43, 48, 46, 40                                  6

Total                                                                                        20

Therefore, the frequency distribution table is

Class intervals:      10-20        20-30        30-40         40-50         Total

Frequency      :          2                4                8                6                20

8 0
2 years ago
elizabeth and success buy books from 2 different book shop, elizabeth bought 4 books for £28, sucess bought 7 book for £63 who h
earnstyle [38]

Answer:

Elizabeth got the better deal

Step-by-step explanation:

Elizabeth bought 4 books for £28 = £28/4 = £7 per book

Success bought 7 books for £63 = £63/7 = £9 per book

7 0
3 years ago
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