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Ostrovityanka [42]
2 years ago
13

Find the value of y if the mean is 22 and 18 ( 2y+1), 10 and 20 is 15​

Mathematics
1 answer:
Igoryamba2 years ago
8 0

Answer:

2

Step-by-step explanation:

Mean = sum of data/sample size

Sum of data = 22 + 18 + 2y+1 + 10 + 20

Sample size = 5

Mean = 15

Substitute

15 = 22 + 18 + 2y+1 + 10 + 20/5

15*5 = 22 + 18 + 2y+1 + 10 + 20

75 = 70+2y+1

2y = 75-71

2y = 4

y = 4/2

y = 2

Hence the value of y is 2

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Solve: 2 ( X + 5 ) = 3X + 1 Show your work
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Answer:

x = 9

Step-by-step explanation:

Given

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2x + 10 = 3x + 1 ( subtract 2x from both sides )

10 = x + 1 ( subtract 1 from both sides )

9 = x

5 0
2 years ago
A patient A receives 3 times the amount of certain medicine as patient B the 2 doses add to 200 milligrams. What amount does eac
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4 0
3 years ago
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choli [55]
5 is correct and 6 is 1/2
7 0
3 years ago
Read 2 more answers
a cell phone company has a basic monthly plan of $40plus $0.45 for many minutes ised over 700. John was charged a total of $48.1
jonny [76]
Cost of month plan = $40

Cost of minutes used = $0.45 after 700 minutes

Total cost = $48.10

Let x be the total minutes used
Total cost = 40 + 0.45(x - 700)

------------------------------------------------------------------
Form the equation and solve x
------------------------------------------------------------------
40 + 0.45(x - 700) = 48.10
40 + 0.45x - 315 = 48.10
0.45x - 275 = 48.10
0.45x = 48.10 + 275
0.45x = 323.10
x = 323.10 ÷ 0.45
x = 718

------------------------------------------------------------------
Answer: John had used 718 mins this month
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8 0
3 years ago
We do #1
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Answer: i dont know, gook luck

Step-by-step explanation:

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