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lakkis [162]
1 year ago
13

How do you know that the sum of 7-1g and 7-2 is rational?

Mathematics
1 answer:
user100 [1]1 year ago
5 0

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

#SPJ9

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Identify the sequence graphed below and the average rate of change from n = 1 to n = 3. coordinate plane showing the point 2, 10
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Answer:

  • geometric sequence with initial value 20 and common ratio 1/2
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Step-by-step explanation:

(a) The given points have sequential values of x and values of y that are each 1/2 the value before. The common ratio tells us the sequence is a geometric sequence.

(b) The first given point is (2, 10), so extrapolating backward, we determine the previous point to be ...

... (2-1, 10/(1/2)) = (1, 20)

Thus, we have enough information to determine the average slope between n=1 and n=3.

... (difference in y)/(difference in n) = (5 -20)/(3 -1) = -15/2 = -7.5

4 0
3 years ago
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3 0
3 years ago
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3 years ago
Find the value of this expression if x = -4.<br> x2 – 7<br> x + 1
Eduardwww [97]

Answer:

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Step-by-step explanation:

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3 0
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Answer:

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Step-by-step explanation:

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