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3 years ago

which of the following Expressions could be interpreted as "a number times negative seven added to five equals two"?

Mathematics

2 answers:

Brrunno [24]3 years ago

5 0

Answer:

It depends on how you interpret the statement.

( x * -7 ) + ( 5 - 2 )

x * ( -7 + 5 ) - 2

Step-by-step explanation:

"a number times negative seven added to five equals two"

Let's set $x$ as our number.

So the statement would translate to:

$x * -7 + 5 - 2$

To simplify, we might try to organize things by adding some parentheses. But that's when things start to get a little.....dicey.

Depending on how you interpret the original statement, both $(x*-7)+5-2$ and $x*(-7+5)-2$ can satisfy the statement.

Herein lies our problem. Which of the two expressions is correct?

Well.....both of them, actually. It just depends on how you're interpreting the statement and what options you have available.

If you can only pick one, but all of the expressions are possible options, then you're kind of stuck.

ryzh [129]3 years ago

3 0

X(-7)+5=2 it can be this

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3 years ago

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laila [671]

Answer:

The proof contains a simple direct proof, wrapped inside the unnecessary logical packaging of a proof by contradiction framework.

Step-by-step explanation:

The proof is rigourous and well written, so we discard the second answer.

This is not a fake proof by contradiction: it does not have any logical fallacies (circular arguments) or additional assumptions, like, for example, the "proof" of "All the horses are the same color". It is factually correct, but it can be rewritten as a direct proof.

A meaningful proof by contradiction depends strongly on the assumption that the statement to prove is false. In this argument, we only this assumption once, thus it is innecessary. Other proofs by contradiction, like the proof of "The square root of 2 is irrational" or Euclid's proof of the infinitude of primes, develop a longer argument based on the new assumption, but this proof doesn't.

To rewrite this without the superfluous framework, erase the parts "Suppose that the statement is false" and "The fact that the statement is true contradicts the assumption that the statement is false. Thus, the assumption that the statement was false must have been false. Thus, the statement is true."

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3 years ago

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Answer:

C, D, and E

Step-by-step explanation:

When trying to solve for the cost of each item you will find a rainbow fish is $8.50 and a tetra is $2.50. If you use that information to solve the other answer choices C, D, and E would be correct

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A. At the very end
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3 years ago

which of the following Expressions could be interpreted as "a number times negative seven added to five equals two"?​

which of the following Expressions could be interpreted as "a number times negative seven added to five equals two"?