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Stolb23 [73]
3 years ago
6

Without calculating, how do you know that the equation | 4x-7 | = -1 has no solution ?

Mathematics
1 answer:
Hatshy [7]3 years ago
4 0
Hello

By just looking at the question, you should know that if there an absolute value symbol (which are those two straight lines surrounding that equation), the answer will always be positive.
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This is my last question can someone help me with my homework.
shutvik [7]

9514 1404 393

Answer:

  C, A, A

Step-by-step explanation:

In general, you ...

  • identify the coefficients of one of the variables
  • swap them, and negate one of them
  • multiply the corresponding equations by the "adjusted" coefficients.

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In problem 1, the x-coefficients are 8 and 2. A common factor of 2 can be removed so that we're dealing with the numbers 4 and 1. Assuming we want to multiply one of the equations by 1, leaving it unchanged, the value we want to multiply by will be -4. After we swap the coefficients, that multiplier is associated with equation 2:

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Likewise, the y-coefficients in problem 1 are -1 and 3. Again, if we want to multiply one of the equations by 1, leaving it unchanged, the coefficient we will change the sign of is -1 (becomes 1). After we swap the coefficients, the multiplier 3 is associated with equation 1:

  multiply equation 1 by 3 . . . (eliminates y)

These two choices are B and A, respectively, so the one that does NOT work for problem 1 is choice C, as indicated below.

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The other problems are worked in a similar fashion.

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3 years ago
Olivia buys 6 packs of muffins. she uses a Coupon and saves $3 off the total.
lyudmila [28]

Answer:

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DedPeter [7]

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Answer:

m= 3/5.

Step-by-step explanation:

The general equation of the line is:

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From the statement we know that (x1, y1) = (6, 8) and (x0, y0) = (1,5)

Then the slope is:

m= (y1 - y0) / (x1 - x0) = (8 - 5)/(6 - 1) = 3/5.

The slope is 3/5

4 0
3 years ago
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