3 years ago

A) 31 c) 30 b) 28 d) 61

Mathematics

1 answer:

Fynjy0 [20]3 years ago

4 0

Answer:

A) 31

Step-by-step explanation:

The difference of low-end values for successive classes is 31. This is the class width.

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A school principal ordered 1,000 pencils. He gave an equal number to each of 7 teachers until he had given out as many as possib

Semenov [28]

1000/7 = 142.857142857

Because this is not an even number we take "142", then times it by 7 teachers.

142*7= 994

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3 years ago

A contractor records all of the bedroom areas, in square feet, of a five-bedroom house as: 100, 100, 120, 120, 180 What is the v

kifflom [539]

The variance is the total of the squared distances of the given data from the mean.

This can be calculated through the equation,

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4 0

3 years ago

Read 2 more answers

Aiden wrote a riddle: Five less than 1/5 times a number is the same as the sume of the number and 1/3. Find the number.

Brrunno [24]

The number is -6.67

Solution:

Let "n" be the number

From given,

$\text{ Five less than 1/5 times a number } = \frac{1}{5}n - 5 = \frac{5}{n} - 5$

$\text{Sum of number and 1/3 } = n + \frac{1}{3} =\frac{3n+1}{3}$

Given that,

Five less than 1/5 times a number is the same as the sum of the number and 1/3

Therefore, we get,

$\frac{n}{5} - 5 = n + \frac{1}{3}\\\\Simplify\ the\ expression\\\\n - 25 = 5(n + \frac{1}{3})\\\\n - 25 = 5n + \frac{5}{3}\\\\n - 25 = \frac{15n + 5}{3}\\\\3n - 75 = 15n + 5\\\\12n = -80\\\\n = -6.67$