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katrin2010 [14]
1 year ago
9

True/False: Negative numbers closed under subtraction. Provide an example if false.

Mathematics
1 answer:
noname [10]1 year ago
8 0

The statement is false .

let ; n=-5

     m=-6

n - m= -5 -( -6 )

       = -5 + 6

       = 1

which is not a negative real number .

therefore it shows that negative real number are not closed under substrsction.

the process or skill of taking one number or amount away from another.

Example: 7-5=2

7 is a minuend

5 is a subtrahend

and 2 is a differenceSubtraction is an arithmetic operation that represents the operation of removing objects from a collection.

to know more about substraction ;

visit ; brainly.com/question/28515282

#SPJ9

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Find the measure of angle B.
Elza [17]

Answer:

The measure of angle B is 122° ⇒ answer D

Step-by-step explanation:

* Lets explain how to solve the problem

- The sum of interior angles of any polygon can found by using this

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∵ ABCDEFG is a polygon of 7 sides

∴ The sum of the measures of the interior angles = (7 - 2) × 180°

∴ The sum of the measures of the interior angles = 900°

∵ m∠A = 12x - 9 , m∠B = 9x + 14 , m∠C = 133° , m∠D = 10x + 9

∵ m∠E = 10x , m∠F = 136° , m∠G = 10x + 5

∵ The sum of all angles = 900°

∴ 12x - 9 + 9x + 14 + 133 + 10x + 9 + 10x + 136 + 10x + 5 = 900

∴ 51x + 288 = 900

- Subtract 288 from both sides

∴ 51x = 612

- Divide both sides by 51

∴ x = 12

∵ m∠B = 9x + 14

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∴ m∠B = 9(12) + 14 = 122°

* The measure of angle B is 122°

3 0
3 years ago
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