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Bond [772]
3 years ago
13

Help Math 60points please

Mathematics
2 answers:
Darina [25.2K]3 years ago
8 0

ANSWER:

<u>On solving equation by quadratic formula method, we get</u>

D = b² – 4ac

  • (–5)² – 4 × 1 × 3
  • 25 – 12
  • 13

D > 0, so it has real roots.

Now, x = – b ± √D/2a

  • – 5 ± √13/2

So, <u>Correct choice</u> - [A] & [C].

finlep [7]3 years ago
4 0

Answer:

solving equation by quadratic formula method, we get:

D = b² - 4ac

=(-5)² - 4 × 1 × 3

=25-12=13

D> 0,

so it has real roots.

x=- b ± √D/2a

- 5 ± √13/2

Correct choice [A] and [C].

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

1) B. The differences are normally distributed or the sample size is large

C. The  sample size mus be large

E. The sampling method results in an independent sample

2) The null hypothesis H₀:  \bar x_1 =  \bar x_2

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The mean

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69.4,      70.5

69.4,      69.9

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68.9,      68.2

70.5,       69.3

69.4,       67.7

69.5,       67

67.2,       63.7

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(We reversed the values in the square root of the denominator therefore, the sign reversal)

t = -0.00693

p- value = 0.498 by graphing calculator function

P-value > α Therefore, we do not reject the null hypothesis

Do not reject Upper H₀ because, the P-value is greater than the level of significance. There is sufficient evidence to conclude that sons are the same height as their fathers  at 0.10 lvel of significance

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