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aleksandr82 [10.1K]
3 years ago
14

Please help thank you. i have 2 questions.

Mathematics
2 answers:
Dahasolnce [82]3 years ago
5 0
1st
A rectangle only has 2 lines of symmetry.  The midpoints of the lengths and widths.

2nd:
Of the list the only letter that has rotational symmetry is the letter O
Alenkinab [10]3 years ago
3 0
For the first one, the answer is 2. You can only fold it vertically and horizontally. For the second one, the answer is O because any way you turn it, it still looks like O. I hope this helps!
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Answer:

Yes. Her solution is correct.

Step-by-step explanation:

Let's check if Jenna solution is correct:

To solve the equation 2x^2 +5x - 42 = 0, we can use Bhaskara's formula:

D = b^2 - 4ac = 25 + 4*2*42 = 25+336 = 361

sqrt(D) = 19

x1 = (-5 + 19)/4 = 14/4 = 7/2

x2 = (-5 - 19)/4 = -24/4 = -6

We must agree with Jenna's solution, because the values she found as solution are correct: with we replace these values of x in the equation, we will find 0 = 0, which is correct and proves that these values are the solution of the equation.

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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