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3 years ago

Beth is solving this equation: 1/x + 3 = 3/x

Mathematics

1 answer:

liubo4ka [24]3 years ago

6 0

Answer:

B and C

Step-by-step explanation:

The really tough one to get rid of is A. She's right in her method and it sounds like A should be a deal breaker. Suppose however, you make y = 1/x. Now the equation is linear.

y + 3 = 3y Subtract y from both sides

3 = 3y - y

3 = 2y Now divide this by by 2

3/2 = y

But they are not the same answer!! You've gotten rid of one problem only to create another. Well yes. I never said it was easy getting rid of A. But remember y = 1/x, so x will equal 1 / y.

x = 1/y = 1//3/2 = 2/3

Now they agree.

That's kind of sneaky you might say. That's right it is. But its not wrong. A is not part of the answer.

B is certainly right.

C is correct as well, That's the way the equation is ultimately solved.

D is nonsense. You can do all sorts of things with the letters in equations

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marysya [2.9K]

Answer:

equation: (7x-4) +19 +(10x+3) = 52
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blue: 19
yellow: 23

Step-by-step explanation:

The equation is based on the relation that the perimeter is equal to the sum of the side lengths.

P = red + blue + yellow

52 = (7x -4) +(19) +(10x +3)

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2 years ago

Mr. Toshiro manages a company that supplies a variety of domestic and imported nuts to supermarkets. He received an order for 12

alexandr1967 [171]

Answer:

n = 120i + 310j + 60k

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Step-by-step explanation:

Let n and p represent the vectors for number of products and prices respectively.

Also, the coordinates i,j and k represent cashews, walnut and Brazil nut respectively.

The vector form of the total number of bags ordered and the cost are;

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We can obtain the total cost by obtaining the dot product of the two vectors.

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