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Stels [109]
4 years ago
5

What number must be added to 15,-6,& 12 to have a mean of 5? EXPLAIN!!

Mathematics
2 answers:
BlackZzzverrR [31]4 years ago
6 0
Mean = sum of all numbers / no of numbers
so u have mean and three of ur numbers given
then
5=(15-6+12+x)/4 x is the number u need to find
then
20= 15-6+12+x multiplying both sides by 4
20=21+x addition and subtraction
20-21=x
x= -1

FrozenT [24]4 years ago
4 0
To get the mean, you add all of the numbers, and then divide the answer by the number of numbers.

15+(-6)= 9
9+12= 21
(21+x= q )⬅️ignore this for now, that's where the unknown number would have been

The mean = 5, and the number of numbers is 4, so basically, you find 5•4=20

So take the 21 from before, and if you add -1, you get 20!

So, x= ➖1⃣!!!!!!! (That's a -1)
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Please give an answer and solution.
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8 0
2 years ago
2(m + 9) = 24 find m
yan [13]

2m+18=24

or,m=6/2

therefore,m=3

6 0
4 years ago
Which of the following is the equation for the line of symmetry in this figure?
pochemuha

Answer:

y = -2

Step-by-step explanation:

This one is easy. As you may know, a axis of symmetry is the line where everything is the same on both sides of it. For this, you can use trial and error or just look at the points on either side. For y = -1, that will put the line in an awkward spot, crossing through 2 slanted lines instead of corners. For x = -1, this just cuts through the shape straight up and down and does not make the shape look equal on both sides of the line at all. Same goes for x = -2. I should probably mention, when you see a line that is described as "x = 1", it is a vertical line, because the line is constantly staying on the point x = 1, while having an infinite number of y-values. When you see "y = 1", it will be horizontal for the same reason, just flipped.

5 0
3 years ago
Consider that x = 5 and y = 7. Which statement is true about x + y? A) The sum of x and y is a rational number. B) The sum of x
gayaneshka [121]

Answer:

The sum of x and y is a rational number

Step-by-step explanation:

X+Y or 5+7=12

A rational number is any number that can be divided without going on and on forever.

5 0
3 years ago
Read 2 more answers
Help8b2 • 2b3 a) 16b-2 ,b) 16b6 ,c) 16b-4 ,d) 16b5
Travka [436]

Answer:

16b^5

Step-by-step explanation:

8b^2×2b^3

= 16b^2+3

= 16b^5

8 0
4 years ago
Read 2 more answers
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