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Alexandra [31]
2 years ago
5

What is the mean of 85,97,84,88,95,100,81

Mathematics
2 answers:
Dahasolnce [82]2 years ago
8 0

Answer:

90

Step-by-step explanation:

Bogdan [553]2 years ago
8 0

Answer:

90

Step-by-step explanation:

1) Add your data together

In this case, it would be 630

2) however many numbers there are (NOT DIGITS) you divide your sum by.

In this case, 7.

Then there’s your mean!

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Y -7.2 = 8 I need this as explanation and in algebraic show
valkas [14]

Answer:

Heyya !

Here's how to do it:-

First write down what's given:-

y -7.2 = 8

Next, we do like this:-

y = 8+ 7.2

We transferred 7.2 to the other side of the ' = ' sign.

When we do so, the sign of the number changes

Here 7.2 was negative first but when we transferred it to the other side, its sign changed to positive.

So,

y = 8 + 7.2

Now, just add it!

8 + 7.2 equals 15.2

<h2>So, the value of y is 15.2  </h2><h2 /><h3>I hope the explanation was clear.</h3><h3>If you still have doubts, let me know in the comments !</h3>
7 0
3 years ago
Find the value of a and b if root3-1/root3+1+ root3+1/root3-1=a+root3 b​
Digiron [165]

Answer:

a=4 and b = 0

Step-by-step explanation:

Given : \dfrac{\sqrt 3 -1}{\sqrt 3+1}+\dfrac{\sqrt 3+1}{\sqrt 3-1}=a+\sqrt 3 b

To find, The value of a and b

Solution,

Solving LHS of the given equation,

\dfrac{(\sqrt 3-1)^2+(\sqrt3+1)^2}{(\sqrt 3+1)(\sqrt 3-1)}=a+\sqrt 3 b

Since,

(a-b)^2=a^2+b^2-2ab\\\\(a+b)^2=a^2+b^2+2ab\\\\(a-b)(a+b)=a^2+b^2

So,

\dfrac{3+1-2\sqrt 3+3+1+2\sqrt 3}{3-1}=a+\sqrt 3 b\\\\4=a+\sqrt 3 b

or

4+0=a+\sqrt 3 b

On comparing we get :

a = 4 and b = 0

4 0
3 years ago
Find the area of the composite figure.
-Dominant- [34]

Answer:

I guess the correct answer is 116 cm

Step-by-step explanation:

8 0
3 years ago
How many terms are in this expression 5xyz​
mafiozo [28]
4 one coefficient and three variables
7 0
3 years ago
A building block is in shape of a cube with each side length of 5. what is the volume?
Alexeev081 [22]
5×5×5 = 125..... cubed
4 0
3 years ago
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