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Liula [17]
4 years ago
13

Derek spends three dollars on breakfast and $5.50 on lunch every school day how much does he spend on breakfast and lunch in a s

chool week
Mathematics
2 answers:
maks197457 [2]4 years ago
7 0

(3+5.50)5

8.50*5=42.5

Derek spends $42.50 each school week.

Vikki [24]4 years ago
7 0
3.00+5.50=8.50
8.50
x5
———
42.5
42.5$ a week is spent on breakfast and lunch
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How do you know that the sum of 7-1g and 7-2 is rational?
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The sum of 7-1 and 7-2 will be a rational number because sum of rational numbers is a rational numbers.

A rational number is a number which can be written in p/q form where q≠0.

We know that when two rational numbers is added then the sum is also a rational number. And when two rational numbers are subtracted then the difference is also a rational number.

So in the given question, lets study the term differently that is,

i) 7 - 1 is a rational number because their difference is equal to 6 and it can be written in p/q form which is 6/1.

ii) 7 – 2 is also a rational number as their difference will be 5 which is a rational and can be written in p/q form which is 5/1.

So when these two rational numbers are added their sum will also be a rational number which is 11.

Learn more about rational numbers here : brainly.com/question/12088221

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2 years ago
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then your left with
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Step-by-step explanation:

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