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3 years ago

What is the mean , median , and sum

Mathematics

1 answer:

mafiozo [28]3 years ago

3 0

Step-by-step explanation:

sum was the first name of integral

and the median is something in the middle

for example :

A . B . C

the median is B

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What is the percent of increase from 3.7 to 5?

Reptile [31]

Answer 35.1%

5/3.7=1.3513

7 0

3 years ago

What three consecutive integers equal -87?

olchik [2.2K]

Answer:

What three consecutive integers have a sum of 87? Which means that the first number is 28, the second number is 28 + 1 and the third number is 28 + 2. Therefore, three consecutive integers that add up to 87 are 28, 29, and 30. We know our answer is correct because 28 + 29 + 30 equals 87 as displayed above.

Step-by-step explanation:

Consecutive integers are as simple as 1, 2, 3!

Integers are consecutive if one follows another. How do we "jump" from one integer to the next? We add 1, right? 7, 8 and 9 are three consecutive integers. Add one to 7 to get 8 and add one more to get 9.

Now lets think about this in algebraic terms. Lets name these consecutive integers , x, y and z.

The problem tells us that their sum is -87. (Recall, "sum" is just a fancy word for the answer when we add.)

x+y+z = -87

Here is the trick! We need to rewrite this equation so that we have only one variable. Easy!

y is one more that x, so y= x+1

And z is one more than y, so z= y+1. But y is also equal to (x+1)! So z=y+1=(x+1)+1=x+2

Now we have a problem that we can solve! x+(x+1)+(x+2)=-87.

Combining term.: 3x+3=-87

Subtract 3 from both sides of the equation: 3x=84

Divide each side of the equation by 3: x=28

We have solved for x, but we are not done! We need to find y and z. I know you can do this. Remember y is one more than x and z is one more than y.

Check your work! Make sure these three consecutive numbers do in fact add up to -87.

4 0

3 years ago

An oval track is made by erecting semicircles on each end of a 44 m by 88 m rectangle. Find the length of the track and the area

Dmitry_Shevchenko [17]

Answer:

The length of the track is 247 m.

The area enclosed by the track is 5391 . 76 sq m.

Step-by-step explanation:

The length of the rectangle = 88 m

The width of the rectangle = 44 m

Now, as we know the semicircles are at the end of rectangular track.

So, the diameter of semicircles = Width of the rectangle

⇒ The diameter of the semi circle = 44 m

⇒Radius of the semi circle = 44/2 = 22 m

TOTAL LENGTH OF TRACK

= 2 ( Length of rectangle) + 2 (Circumference of 1 semicircle)

= 2 x (88 m) + 2 ( $\frac{2\pi r}{2}$ )

= 176 m + 2 (3.14)(22 m) = 176 + 71.08 = 247 m

Hence, the length of the track is 247 m

TOTAL AREA OF TRACK

= (Area of rectangle) + 2 (Area of 1 semicircle)

= (Length x Width) + 2 ( $\frac{\pi r^2}{2}$ )

= (44 m x 88 m) + (3.14)(22 m)(22 m) = (3872 + 1519.76) sq m

= 5391 . 76 sq m

Hence, the area enclosed by the track is 5391 . 76 sq m.

7 0

3 years ago

Find the value of x . 12.5,−10,−7.5,x ; The mean is 11.5 .

fomenos

There are four values, including the unknown value x. The sum of the four values is the given value of the mean, 11.5, multiplied by four. Let S be the sum of the four values. Then we can write:
$S=11.5\times4=46$

$46=12.5 + (-10)+(-7.5)+x$
x = 46 + 5 = 51
The answer is: The value of x is 51.

4 0

4 years ago

Need help asap!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ugo [173]

Answer:

25.92

I hope this helps! ^^

4 0

3 years ago

Read 2 more answers