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valentina_108 [34]
3 years ago
8

A set of data consists of 38 observations. how many classes would you recommend for the frequency distribution

Mathematics
1 answer:
storchak [24]3 years ago
6 0

solution:

use 2 to the k rule:

2⁵= 32

32 is less than 38,

so,

5 classes are not enough

try the next highest number:

2⁶ = 64

64 is greater than 38 ,

so,

the recommended number of class is 6.

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Quickly solve (x+7)2=121, for x. Graph the solution on a number line.
asambeis [7]

Answer:

The value of the x is 53.5 or x=53.5

Step-by-step explanation:

Given data in the question:-      

(x+7)2=121

We have to find the value of x.

Solution:-        

(x+7)2=121\\=>2x+14=121\\=>2x=121-14\\=>2x=107\\=>x=107/2\\=>x=53.5\\

Hence the answer is 53.5

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If x+y=6 and xy =2find x³+y³(please help me fast with explanation also please) T^T​
Maurinko [17]

Answer: x³+y³=180

Step-by-step explain:                                                                                            let's remember the formula                                                                                 x³+y³=(x+y)(x²-xy+y²) and also  x³+y³=(x+y)³-3xy(x+y)                                              then                                                                                      \displaystyle\boldsymbol{ x^3+y^3=\underbrace{(x+y)^3}_{6}-3\underbrace{xy}_{2}\underbrace{(x+y)}_6}=\\\\6^3-3\cdot 2\cdot 6=216-36=180                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

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