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zalisa [80]
3 years ago
11

What happens to the mean of the data set {2, 4, 7, 6, 3, 6, 7} if the number 25 is added?

Mathematics
2 answers:
Margaret [11]3 years ago
8 0

Answer:

It goes up by 2.5

Step-by-step explanation:

Mean equation: (n₁ + n₂ + n₃ + ...)/n

Current mean: (2 + 4 + 7 + 6 + 3 + 6 + 7)/7 = 35/7 =<em> 5</em>

New mean: (2 + 4 + 7 + 6 + 3 + 6 + 7 + 25)/8 = 60/8 = <em>7.5</em>

Difference: 7.5 - 5 = 2.5

puteri [66]3 years ago
6 0

Answer:

the answer is 60

Step-by-step explanation:

2+4= 6

6+7= 13

13+6= 19

19+3=22

22+6= 28

28+7= 35

35+25= 60

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13x+5y=90 what is x? what is y?
Leona [35]

Answer:

X=-5y/13+90/13, Y=-13x/5+18

Step-by-step explanation:

You need to solve the equation for X and Y.

Solving for X:

13x+5y=90

Subtract 5y: 13x=-5y+90

Divide by 13: x=-5y/13+90/13

--

For Y:

13x+5y=90

Subtract 13x: 5y=-13x+90

Divide by 5: y=-13x/5+90/5

(Simplifies to -13x/5+18)

3 0
3 years ago
An object that weighs 1 pound on Earth weighs only 0.17 pound on the moon. zacks dog weighs 17 1/2 pounds on earth. how much doe
balu736 [363]
His dog weighs 2.975 pounds on the moon, his dog weighs 14.525 more pounds on earth
3 0
3 years ago
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Help ND show work as soon as possible
balu736 [363]

Answer:

the answer is c

3 0
2 years ago
Read 2 more answers
Please help !!! I don’t understand 25 points !
Goryan [66]

Answer: Triangle VUT:

84:70:42

Triangle RSQ:

30:25:15

Final simplified answer: 2.8:2.8:2.8

Scale factor of 2.8

Step-by-step explanation:

Each triangle's sides are a part of the ratio, then you divide each side by the corresponding one (84 by 30, and 70 by 25) to get your scale factor.

4 0
10 months ago
How is the answer 16? Please explain
Viktor [21]
Triangle STU is similar to triangle SVW
so

  TU          ST
------- = ---------- (as you know SV = ST + TV  = 12 + 18 = 30)
  VW       SV
so
  TU          12
------- = ---------- 
  40          30

TU = 12 * 40 / 30
TU = 16

answer
16 inches
7 0
3 years ago
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