3 years ago

Each floor has r rooms. On 8 floors, there are a total of 256 rooms. Wrongs an equation to represent this situation

Mathematics

1 answer:

ExtremeBDS [4]3 years ago

3 0

Answer: 8r = 256

Step-by-step explanation:

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What is the ratio that is equivalent to 7/9

Oliga [24]

Answer:

$\frac{14}{18}$ is one equivalent ratio

Step-by-step explanation:

Given the ratio

$\frac{7}{9}$ ← in simplest form

Then to obtain equivalent ratios

Multiply the numerator/ denominator by the same value, that is

$\frac{7(2)}{9(2)}$ = $\frac{14}{18}$

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3 years ago

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What does negative 2 over 7 > −4 indicate about the position of negative 2 over 7 and −4 on the number line?

jeyben [28]

-4/7 > -2

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3 years ago

Determine if the conditional statement is true or false given the following: p is false. q is false. Is -q -p true or false?

Vikki [24]

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3 years ago

What is the standard deviation of the following data set rounded to the nearest tenth? 56 ,78 ,123 , 34, 67, 91, 20

quester [9]

Answer:

The standard deviation of the following data set is 32.2

Step-by-step explanation:

step 1

Find the mean

we have

$[56,78,123,34,67,9,20]$

Sum the data and divided by the number of elements

$[56+78+123+34+67+91+20]/7=469/7=67$

step 2

For each number: subtract the Mean and square the result

$[(56-67)^{2},(78-67)^{2},(123-67)^{2},(34-67)^{2},(67-67)^{2},(91-67)^{2},(20-67)^{2}]$

$[121,121,3,136,1,089,0,576,2,209]$

step 3

Work out the mean of those squared differences

$[121+121+3,136+1,089+0+576+2,209]/7=1,036$

This value is called the "Variance"

step 4

Take the square root of the variance

$standard\ deviation=\sqrt{1,036}=32.2$

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3 years ago