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CaHeK987 [17]
4 years ago
5

Which sets of numbers are closed under division? Choose all answers that are correct. A. rational numbers B. integers C. {–1, 0,

1} D. whole numbers
Mathematics
2 answers:
forsale [732]4 years ago
5 0
A. Rational numbers are closed under division.

If you divide a rational number, it will remain a rational number. If you divide an integer or a whole number, there is a chance that the new resulting number will not be an integer or a whole number.
kotegsom [21]4 years ago
3 0
The answer to your question is A. rational numbers.

Rational numbers are closed under any set of operations.

Integers are not closed under division because 1/2 is not an integer.

The set {-1, 0, 1} is also not closed under division because -1/5 does not fall in that set.

Whole numbers are not closed under division because 5/3 will produce a number that is not a whole integer.

Your answer is A. rational numbers.
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Joyce paid $98.00 for an item at the store that was 30 percent off the original price. What was the original price?
jekas [21]

Answer:

$68.60

Step-by-step explanation:

If the original price is $98

30% = 0.03

0.30*98=29.40

Then, 98−29.40=$68.60

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3 years ago
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Which relation is a function? Select all that apply.
sineoko [7]
The first 3 are functions as their x coordinate (number on the left side of the parentheses) is not repeated in any of the other parentheses
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3 years ago
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A barber’s chair with a person in it weighs 2118.0 N. The output plunger of a hydraulic system begins to lift the chair when the
liq [111]

Answer:5.8

Step-by-step explanation:

Given

weight of chair with person on it =2118 N

Barber applies a force of 63 N

Using pascal's law

we know pressure around both sides is equal

i.e. P_{chair}=P_{piston}

pressure=\frac{force}{area}

P_{chair}=\frac{2118}{\pi \dot r_{plunger}^2}

P_{piston}=\frac{63}{\pi \dot r_{piston}^2}

substituting values

\left [\frac{r_{plunger}^2}{r_{piston}^2}\right ]=\frac{2118}{63}

\left [\frac{r_{plunger}}{r_{piston}}\right ]=\left [ \frac{2118}{63}\right ]^{0.5}

\left [\frac{r_{plunger}}{r_{piston}}\right ]=5.798

5 0
3 years ago
1) A speed walker covered 4 1/2 mi in 3/4 hour. How far will he walk with the same pace in 2 hours? 3 hours? 3.5 hours?
Savatey [412]

You can solve this with proportion

1)    For 2h

9/2 mile : 3/4h = x mile : 2h => (3/4)x=(9/2)*2 => (3/4)x=9 => x=9*(4/3)= 12miles

For 3h => (3/4)x=(9/2)*3 When we divide equation with 3 we get

x/4=9/2 => x=(9/2)*4=18 miles

2)  2 combine : 320 acres = 7 combines : x acres +: 2x= 320*7 =>

x= (320*7)/2 = 160 * 7 = 1120 acres

Good luck!!!


3 0
3 years ago
a company makes 2,500 profit on the sale of 20 products, what is the profit when the company sells 300 products
Morgarella [4.7K]

$37,500 profit


To solve this, find the unit rate by dividing 2500 by 20. This will get you an average of $125 profit made per product sold. Then multiply that by 300 (the number of products sold in total) to get your answer of $37,500 profit total.

8 0
4 years ago
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