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Galina-37 [17]
3 years ago
8

a chessboard has 64 squares at a chess tournament 84 chessboards were used how many squares are there on 85 chessboards

Mathematics
2 answers:
jasenka [17]3 years ago
5 0
There are 5376 squares on all of the chessboards because 84 x 64= 5376
lidiya [134]3 years ago
5 0

Answer:

5,440 squares.

Step-by-step explanation:

We have been given that a chessboard has 64 squares. At a chess tournament 84 chessboards were used.

To find the number of squares on 85 chessboards, we will multiply number of squares on each chess board by number of total chess boards.

\text{The number of squares on 85 chessboards}=\frac{\text{64 squares}}{\text{Chess board}}\times \text{85 chess boards}

\text{The number of squares on 85 chessboards}=\text{64 squares}\times 85

\text{The number of squares on 85 chessboards}=5440\text{ squares}

Therefore, there are 5440 squares on 85 chess boards.

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When Noah goes bowling, his scores are normally distributed with a mean of 150 and a standard deviation of 12. What is the proba
Zarrin [17]

Answer:

The probability of his score being between 135 and 167 is 0.8151 or (0.8151*100=81.51%)

Step-by-step explanation:

Given that:

Mean = μ = 150

SD = σ = 12

Let x1 be the first data point and x2 the second data point

We have to find the z-scores for both data points

x1 = 135

x2 = 167

So,

z_1 = \frac{x_1-mean}{SD}\\= \frac{135-150}{12}\\=\frac{-15}{12}\\=-1.25

And

z_2 = \frac{x_2-mean}{SD}\\z_2 =\frac{167-150}{12}\\=\frac{17}{12}\\= {1.416}

We have to find area to the left of both points then their difference to find the probability.

So,

Area to the left of z1 = 0.1056

Area to the left of z2 = 0.9207

Probability to score between 135 and 167 = z2-z1 = 0.9027-0.1056 = 0.8151

Hence,

The probability of his score being between 135 and 167 is 0.8151 or (0.8151*100=81.51%)

3 0
3 years ago
Tadashi had a veggie pizza that was cut into 8 equal pieces. He ate 2 pieces and left the other 6 in the box. What fraction of t
Stella [2.4K]

Answer:

1/4

Step-by-step explanation:

2/8= 1/4

8 0
3 years ago
Need help ASAP ,<br><br> -40 points
user100 [1]

Answer:

A

Step-by-step explanation:

MK and KM are the same line segment

and JKM and LMK share two angles K and M as well as the side of MK or KM making it a Side.Angle.Side

5 0
3 years ago
Which of the following is an example of a permutation?
N76 [4]

Permutation helps us to know the number of ways an object can be arranged in a particular manner. The correct option is D.

<h3>What are Permutation and Combination?</h3>

Permutation helps us to know the number of ways an object can be arranged in a particular manner. A permutation is denoted by 'P'.

The combination helps us to know the number of ways an object can be arranged without a particular manner. A combination is denoted by 'C'.

The example which is an example of permutation is Selecting a first-, second-, and third-place winner at baking.

Hence, the correct option is D.

Learn more about Permutation and Combination:

brainly.com/question/11732255

#SPJ1

7 0
2 years ago
I'm stuck on another question 5 4/5 + (-3 2/7)
anyanavicka [17]

So that would be the same thing as 5 4/5 - 3 2/7

Put them in mixed fractions to become 29/5 - 23/7

Multiply one side by 7 and one side by 5 to get the same denominator  

203/35 - 115/35

Now subtract the numerators to get

88/35

Or if they want it inixed numbers then 2 18/35

5 0
3 years ago
Read 2 more answers
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