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jonny [76]
2 years ago
5

Can you please give me the answer

Mathematics
2 answers:
ladessa [460]2 years ago
7 0

Answer:

Your answer should be B.  x + -1 +- √17

Step-by-step explanation:

Artemon [7]2 years ago
3 0

Answer:

B

Step-by-step explanation:

Given

x² + 2x + 1 = 17

Note that the quadratic on the left side is a perfect square, that is

(x + 1)² = 17 ( take the square root of both sides )

x + 1 = ± \sqrt{17} ( subtract 1 from both sides )

x = - 1 ± \sqrt{17} → B

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In how many ways can six people sit in a six-passenger car?
nekit [7.7K]

Answer:

number of ways = 720

Step-by-step explanation:

The number of ways  six people sit in a six-passenger car is given by the number of permutations of 6 elements in 6 different positions ( seats), then

number of ways = number of permutations of 6 elements = 6! = 6 * 5 * 4 *3 * 2 * 1 = 720

Since the first person that sits can be on any of the seats , but then the second person that sits can choose any of 5 seats (since the first person had already occupied one) , the third can choose 4 ... and so on.

5 0
3 years ago
Arlene buys a phone case and charging cord for 15% off. The original cost of the phone case is $18. Her total discount is $4.20.
mel-nik [20]

Answer: $10

Step-by-step explanation:

Assume the price of the phone case is x.

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Discounted price for phone case :  15% * x

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Expression is therefore:

0.15x + 0.15y = 4.20

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0.15y = 4.2 - 2.7

y = 1.5/0.15

y = $10

5 0
3 years ago
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SVETLANKA909090 [29]

Answer:

8/45

Step-by-step explanation:

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2 years ago
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