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3 years ago

Please help me with this question

Mathematics

1 answer:

Pavlova-9 [17]3 years ago

6 0

Answer:

Step-by-step explanation:

The mean is the average. There are two ways to do this question shown.

1- You can calculate the mean by adding them all up and find the current mean. You can then add the numbers and then divide again-

88+100+76+92+83=439.

439/5=87.8

The current average is 87.8. Now, you can add and divide again.

439+71=510. 510/6=85.

You now have the answer. However, you might want to check again.

439+76=515

515/6=85.833....3

It is more than 85, so the answer is 71.

2- Find out how much more all the numbers are than the smallest number.

First, I'll organize it.

-76, 83, 88, 92, 100-

The smallest number is 76, so subtract 76 from each.

0, 7, 12, 16, 24 added up together is 59.

59/5=11.8

76+11.8=87.8

That also gives you that the average is 87.8.

You can then see how much or less the number is than the average and then add.

71 is five LESS than the average, so it's -5.

54/6=9.

9+76=85.

Thus, 71

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1) a^2+2ab+b^2=25, find a+b

Pavel [41]

Answer:

1) -5 and +5; 2) -9 and +9

Step-by-step explanation:

1) a² + 2ab + b² = 25

(a + b)² = 25 Wrote the left-hand side as a square

a + b = ±5 Took the square root of each side

All values of a + b are -5 and +5.

2) a² − 8ab + 16b² = 81

(a - 4b)² = 81 Wrote the left-hand side as a square

a - 4b = ±9 Took the square root of each side

All values of a - 4b are -9 and +9.

3 0

4 years ago

What’s 1/6 to 3 dp does anyone know?

Irina18 [472]

❄ Hi there,

$\sf{\dfrac{1}{6}\approx0.167}$ , rounded to 3 DP (decimal places)

$\left\vert\textsf{Decimal Places = Number of digits after the decimal point}\vert$

Why round? Because the entire number goes on for ever and ever.

So, we need to round. 1/6 rounded to 3 decimal places is 0.167. We have 3 numbers after the decimal point.

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4 0

2 years ago

Please help will mark brainiest

alex41 [277]

Answer:

$y=2.75$ units.

Step-by-step explanation:

We have been given that the bottom of a vase is a square. Each side measures y+11 units. The square has a perimeter of 55 units.

Since we know that all sides of square are of equal measure and the perimeter of a square is 4 times the length of each side.

$\text{Perimeter of square}=4\times\text{Length of each side}$

Upon substituting our given values in above formula we will get,

$55=4\times (y+11)$

Upon distributing 4 we will get,

$55=4y+44$

Upon subtracting 44 from both sides of our equation we will get,

$55-44=4y+44-44$

$11=4y$

Upon dividing both sides of our equation by 4 we will get,

$\frac{11}{4}=\frac{4y}{4}$

$2.75=y$

Therefore, the value of y is 2.75 units.

6 0

4 years ago

Can somehow show me the work to find the answer

erma4kov [3.2K]

Answer:

Hii, I might be wrong since it's been like 3 years buuuuuut I'll try!

Step-by-step explanation:

So basically, you break the shape up into pieces. I'll attach my work under.

Then you find the area of that one piece and then ad it together. (Refer to my work below)

4 0

3 years ago

Plz guys help me to find the area of this rectangle.<br>

Anna35 [415]

Answer:

20pq unit²

Step-by-step explanation:

area= length×breadth

area= 4pq×5pq= 20pq unit ²

hope it helps!

7 0

3 years ago

Read 2 more answers