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Musya8 [376]
3 years ago
11

The sum of two numbers is 12. The difference of the same two numbers is −4. Find the two numbers.

Mathematics
2 answers:
Amanda [17]3 years ago
8 0

Answer: x = 4, y = 8

Step-by-step explanation:

Let the two numbers be x and y

sum of the two numbers will be

x + y =  12 ------------------------------1

Difference of the two numbers

x - y  =  -4 ----------------------------- 2

Now, to find the two numbers , we solve equation 1 & 2 together

  x + y =  12

  x - y  =  -4

we now add the two equations to eliminate y

   2x =  8

      x = 4.  Now to find the value of y, we substitute for x in any of the equation above

 x + y  = 12

 4  + y = 12

        y =  12 - 4

        y  =  8

   

Butoxors [25]3 years ago
7 0

Answer:

  4 and 8

Step-by-step explanation:

Let 'a' represent one of the numbers. Then the other is 12-a, and their difference is ...

  a - (12-a) = -4

  2a = 8 . . . . add 12

  a = 4 . . . . . divide by 2

  12-a = 8 . . . . find the other number

The two numbers are 4 and 8.

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The area of the region under the curve of the function f(x) = 5x + 7 on the interval [1, b] is 88 square units, where b > 1.
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3 years ago
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Given a = -3, b = 4 and c = -5, evaluate a - b - c. -12 -6 -2
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4 0
4 years ago
Solve the problem:
stepan [7]

volume of the box is 675 cubic inches

A machine produces open boxes using square sheets of plastic.

It is a square sheet so length and width are same

Lets assume length as x so width is also x

The machine cuts equal-sized squares measuring 3 inches on a side from each corner of the sheet.

After turning up the sides the height of the box becomes 3 inches

We know the volume of a box formula

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We know length is  x , width is x  and height = 3

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Given volume = 675 cubic inches

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5 0
4 years ago
A repair person charges $25 per hour plus and initial service charge of $30.
Norma-Jean [14]

Answer:

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Step-by-step explanation:

155 = 25x + 30

125 = 25x

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3 years ago
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