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3 years ago

Twice a number decreased by 11 is -23

Mathematics

1 answer:

strojnjashka [21]3 years ago

7 0

Twice a number decreased by 11 is -23

Let the number be x

So we get the equation

2x -11 = -23

Add 11 to both sides

2x = -12

Divide both sides by 2

x = -6

So the number is -6

Negative 6

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2 years ago

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Answer:

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Step-by-step explanation:

Let

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we know that

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the formula to calculate the distance between two points is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

step 1

Find the distance AB

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substitute in the formula

$AB=\sqrt{(1-1)^{2}+(1+3)^{2}}$

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step 2

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substitute in the formula

$BC=\sqrt{(-2-1)^{2}+(1-1)^{2}}$

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step 3

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step 4

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substitute the values

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