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Nikitich [7]
3 years ago
8

An equation and the steps to solve it are shown below: 3x minus one over five times the quantity 10x plus 5 equals 6 Step 1: 3x

– 2x – 1 = 6 Step 2: x – 1 = 6 Step 3: x – 1 – 1 = 6 – 1 Step 4: x = 5 In which step was the error made and why?
Mathematics
1 answer:
lesya692 [45]3 years ago
5 0

Answer:

either of Step 3 or Step 4

Step-by-step explanation:

At Step 3, -1 is added to both sides of the equation. Technically, this is correct (not an error), but it does not lead to a solution to the equation (so, could be considered to be an error). Adding +1 to both sides of the equation would lead more directly to a solution.

__

At Step 4, x -1 -1 is simplified to x. This is an error, as the correct simplification is x-2, so the equation after this step should read x-2 = 5. If Step 3 had been executed by adding +1 to both sides of the equation, then the simplification here would be x=7.

_____

Answering "why" someone does something is always tricky. One can project one's own interpretation onto the actions of others, but one never really knows whether that is accurate or not.

The "why" in this case could go back to the motivation of the problem's author, which may be to see if the student can recognize that the opposite of -1 is +1, or that the sum -1-1 is not zero.

___

My guess is that Step 3 is considered to be the erroneous step, and that choosing Step 4 will get you into a losing argument with your grader.

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3 years ago
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Which is smaller-21/35, 7/5​
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Answer:

-21/35

Step-by-step explanation:

So, 7/5 is a postive number, since it doesn't have a negative - sign in front of it. On the other hand, -21/35 does. Knowing this, we can conclude that -21/35 is smaller than 7/5.

If you want another way of thinking about it, just guessing, what is 7/5? Well, 7 is bigger than 5, so it must be at least 1. On the other hand, with -21/35, the -21 doesnt look like its bigger than 35, so it must be smaller than 1.

Answer:

<u>-21/35 is smaller than 7/5 </u>

<u></u>

<u>Ti⊂k∫∈s ω∅∅p</u>

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3 years ago
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Please help with hold page
STALIN [3.7K]
1. mucus - a slimy substance produced in the nose and throat to moisten and protect them 
2. sterile -  free from germs
3. enables - gives ability, power, or means to; makes able
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5. critical - being important to the outcome of a situation

For #6-10, the word in italics is the one most similar to the first word.

6. scarce | plenty | many | <em>rare</em>
7. critical | <em>important</em> | useful | relaxed
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3 years ago
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Need some help on this
Marina CMI [18]

Answer:

G

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From the box plots given, the options that seem very much on support of the information given in the box plot is option G.

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