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yarga [219]
2 years ago
7

Hannah does push-ups in sets of 3. she did 10 sets of push-ups today. then her coach asked her to do 15 more push-ups.

Mathematics
1 answer:
inn [45]2 years ago
8 0

Answer:

Step-by-step explanation:

10 sets × (3 pushups)/set = 30 pushups

She did a total of 30+15 = 45 pushups

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we can see this because the line crossed the 2 on the y axis line

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You spin the spinner below once. What is the probability that the arrow will land on 3
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0<br> 류<br> In<br> +<br> 0<br> 4<br> 1<br> 6<br> 1<br> Which fraction is equal to<br> 좋
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3 years ago
Which set is closed under subtractionWhich answer choice shows that the set of irrational numbers is not closed under addition
vovikov84 [41]

Answer:

(a) Set of rational numbers

(b) \pi + (-\pi) = 0

Step-by-step explanation:

Solving (a): Set that is closed under subtraction

The solution to this is rational numbers.

For a set of number to be closed under subtraction, the following condition must be true

a -b = c

Where

a, b, c are of the same set.

The above is only true for rational numbers.

e.g.

1 - 2 = -1

5 - 5 = 0

\frac{1}{2} - \frac{1}{4} = \frac{1}{2}

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The operations and the result in the above samples are rational numbers.

Solving (b): Choice not close under addition[See attachment for options]

As stated in (a)

For a set of number to be closed under subtraction, the following condition must be true

a -b = c

Where

a, b, c are of the same set.

In the given options (a) to (d), only

\pi + (-\pi) = 0 is not close under addition because:

\pi is irrational while 0 is rational

<em>In other words, they belong to different set</em>

8 0
2 years ago
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