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2 years ago

What is the solution to -2|x − 1| = -4? A. x = 3 B. x = -1 or x = 3 C. x = 1 or x = 3 D. No solutions exist.

Mathematics

1 answer:

PSYCHO15rus [73]2 years ago

4 0

Answer:

Step-by-step explanation:

-2|x - 1| = -4

|x - 1| = 2

since we are dealing with a function that brings 2 values to the same result, the reverse function (needed to find the values of x that create the result y) has 2 branches :

(x - 1) = 2

and

(x - 1) = -2

x - 1 = 2

x = 3

x - 1 = -2

x = -1

therefore, B is the right answer.

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What is the answer 2(4y+1)=3y

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2(4y+1) = 3y. We need to solve for y.
First let's get ride of the parenthesis by developing 2(4y+1). This means to multiply 2 by 4y and 2 by 1, and add them.
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So 2(4y+1)=3y
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Then you subtract 8y from each side to have the variables on a side and the numbers on the other:
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Then you divide each side by -5 to get the variable y alone on a side and its value on the other:
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You can re-check your answer (very important):
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The answer has been approved.

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Convert 7 pounds 3 ounces to

svetoff [14.1K]

7 pounds and 3 ounces equal to 3.27 kg

Step-by-step explanation:

We need to convert 7 pounds and 3 ounces to kilograms.

We know:

1 lb = 16 oz

and 1 kg = 2.2 lb

where lb stands for pounds and oz stands for ounces and kg stands for kilograms.

$16\,\,oz = 1\,\,pound\\1\,\,oz = \frac{1}{16} \,\,pound\\3\,\,oz = \frac{1}{16} * 3\,\,pounds\\3\,\,oz = 0.1875\,\,pounds$

So, Total pounds = 7+0.1875 = 7.1875

Now, Converting Pounds to kg

$2.2\,\,pounds = 1\,\,kg\\1\,\,pound = \frac{1}{2.2} \,\,kg\\7.1875\,\,pounds = \frac{1}{2.2} * 7.18757.1875\,\,pounds = 3.27\,\,kg$

So, 7 pounds and 3 ounces equal to 3.27 kg

Keywords: Converting Pounds to Kgs

Learn more about Converting Pounds to Kgs at:

#learnwithBrainly

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