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Olenka [21]
3 years ago
7

9 is the difference between two numbers, and their sum is 31. Find the numbers.

Mathematics
1 answer:
algol [13]3 years ago
4 0

Answer:

The first number is 20, the second one is 11

Step-by-step explanation:

Let the first number be x and the second number be y

Since it says "9 is the difference between two numbers", the first equation will be x-y=9

It also says that "their sum is 31". That means the second equation will be x+y=31

here are the two equations:

x-y=9

x+y=31

You can solve this any way you like, but I'll show elimination

add the two equations

x-y=9

x+y=31

2x=40

divide by 2

x=20

Substitute 20 as x in one of the equations

20+y=31

subtract 20 from both sides

y=11

That means the two numbers are 20 and 11

Hope this helps!

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Answer:

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Step-by-step explanation:

8 0
4 years ago
What type of measurement would you use to describe the amount of water a pot can hold
Inga [223]
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5 0
3 years ago
The number -5 is all of the following except
LenaWriter [7]

The correct answer is A. A whole number

Explanation:

In mathematics, whole numbers include numbers that do not include a fraction, for example, the number 4.2 includes a fraction, and therefore it is not a whole number. Moreover, whole numbers include numbers from 0 to infinity but not negative numbers. This means the number -5 is not a whole number because even then this does not include a fraction it is a negative number. According to this, this number is an integer (it does not include fractions), a rational number (it can be expressed as a fraction), and a real number (it can be represented in a line), but not a whole number.

8 0
3 years ago
4 over x+4 - 2 over x+1
babymother [125]
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7 0
3 years ago
Explain how you can divide 6/8 by 0.25. Show the steps to your answer and reply to at least two other responses.
blondinia [14]

Answer:

The result is 3.

Step-by-step explanation:

One way is to convert the 0.25 to a fraction.

Thus 0.25 = 25/100 = 1/4.

Note 6/8 simplifies to 3/4, so we have the division:-

3/4  /  1/4

We invert the 1/4 and multiply:-

= 3/4 * 4/1

= 12/4

= 3 (answer).

4 0
3 years ago
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