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Cerrena [4.2K]
3 years ago
10

Which counterexample shows that the conjecture "Every parallelogram is also a rectangle" is false?

Mathematics
2 answers:
mafiozo [28]3 years ago
5 0
A parallelogram without four right angles would prove that to be false.
Ivanshal [37]3 years ago
3 0
Yep that'd be false since they are also rectangles
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9514 1404 393

Answer:

  k = -1

Step-by-step explanation:

Put the given value of x in the equation, and solve the resulting equation for k.

  2(5 -3) +k(1 +2·5) = k - 5 - 1

  2(2) +k(11) = k -6 . . . . simplify a bit

  10k = -10 . . . . . . . . . . add -4-k to both sides

  k = -1 . . . . . . . . . . . . . divide by 10

The value of k is -1.

_____

<em>Check</em>

Use k = -1 in the original equation and solve for x.

  2(x -3) -(1 +2x) = -1 -x -1

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3 years ago
marys age is 2 upon 3 that of peters age. two years ago marys age was 1 upon 2 of whats peters age will be in 5years time. how o
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Answer:

the Peter age be 27

Step-by-step explanation:

Let assume peter be

And, then mary is 2p ÷ 3

So

The equation would be  

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And, the mary age is

= 2 (27) ÷ 3

= 18

Hence, the Peter age be 27

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