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Radda [10]
3 years ago
9

Eric's notebook has 30 pages. he wants to writes a number on each page. how many digits will he write when he numbers all the pa

ges in the notebook?
a. 9
b. 29
c. 49
d. 51
Mathematics
1 answer:
Roman55 [17]3 years ago
8 0
The answer is d (i.e. 51).
the first 9 pages utilize 9 digits. the remaining 21 pages utilize two digits number. Therefore,
21*2=42
the total is 42+9=51
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Add 34+(−212) using the number line. Select the location on the number line to plot the sum.
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Answer:

Answer is explained below in the explanation section.

Step-by-step explanation:

Solution:

For this question, we need to have a number line, we can not make the number line here. As it will be very long. Instead, I have attached a number line from -11 to +11 for your understanding and explained it below. Please refer to the attachment below for the number line.

Number Line:

A number line is a line which contains all the numbers from negative infinity to positive infinity divided by a single number zero. It has two sides, left hand side and right hand side. A side left to zero contains all the negative numbers and a side right to 0 contains, all the positive numbers.

So,

We are asked to add 34 in (-212), we will get 178 but with the negative sign, and it will lie on the left hand side of the number line.

SO,

34 + (-212) = 34 - 212 = -178

Hence,

Our sum which is 178 will lie on the left hand side of the number line.

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\huge\boxed{7}

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