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4 years ago

Which set is closed under subtraction?

Mathematics

2 answers:

AURORKA [14]4 years ago

8 0

The set that is closed under subtraction is rational numbers

Marrrta [24]4 years ago

5 0

Answer:

The correct answer is rational numbers.

Step-by-step explanation:

We consider that a set is closed when the two elements that are part of an operation result in an element belonging to the same group.

As for rational numbers, they are all those that can be represented as the quotient of two whole numbers or, a whole and a positive natural.

These types of numbers are considered in a set closed under addition, subtraction, and multiplication.

Given this information we can say that the correct answer is rational numbers.

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Judy and Tomie traveled 237 miles in 8 hours.if they continue traveling at the same rate, how long will it take them to travel 6

GaryK [48]

237 654
- = -
8 x
cross multiply
5232=237x
÷237 ÷237
x=22.0759
It will take them about 22 hours

6 0

3 years ago

After spending $30 in a dress, Mary had 3/8 of her money left. How much money did she had first ?

Dennis_Churaev [7]

Answer:

answer is below

Step-by-step explanation:

3/8x(how much money she had)= 30

So, Mary originally had $80.

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4 years ago

Solve for x. 4x2 = 324

Vlad [161]

Answer:

=−9

Step-by-step explanation:

4x^{2}=324

4x2=324

−

4x^{2}-324=0

4x2−324=0

(

−

)

(

−

)

4(x^{2}{\color{#c92786}{-81}})=0

4(x2−81)=0

(

−

)

<h2><u><em>Happy To Help!</em></u></h2>

5 0

3 years ago

Two fifths of the girls in school signed up to play softball. An equal number of girls signed up to play pitcher, infield and ou

podryga [215]

The fraction of the girls signed up to play outfield is $\frac{2}{15}$

<em><u>Solution:</u></em>

Given that Two fifths of the girls in school signed up to play softball

An equal number of girls signed up to play pitcher, infield and outfield

So there are 3 equal groups formed from two fifth

This means that we could divide the 2/5 initial group into 3 equal smaller groups for each play pitcher, infield and outfield

Therefore, fraction of the girls signed up to play outfield is found by dividing $\frac{2}{5}$ by 3

$\text{ Fraction of girls play outfield } = \frac{\frac{2}{5}}{3}\\\\\text{ Fraction of girls play outfield } = \frac{2}{5} \times \frac{1}{3}\\\\\text{ Fraction of girls play outfield } = \frac{2}{15}$

Thus fraction of the girls signed up to play outfield is $\frac{2}{15}$

4 0

4 years ago

OPRobert made a design on his wall with the similar pentagon tiles shownR9 cm9 cmKMQs15 cm10 cm10 cm15 cmUT10 cmP15 cmNnot drawn

kakasveta [241]

Since they are simmilar we will then have the following relationships.

$\frac{15}{10}=\frac{9}{x}$

Now, we solve for x, as follows:

$x=\frac{9\cdot10}{15}\Rightarrow x=6$

The expression goes along the lines of. 15 is to 10 what 9 is to x, with this as was done we solve for x and determine it's value, that since they keep proportionality.

7 0

1 year ago