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kolbaska11 [484]
3 years ago
11

X^2+2x - 73 = 7 completing the square

Mathematics
1 answer:
Anestetic [448]3 years ago
8 0

Answer:

x1 = -10, x2 = 8

Step-by-step explanation:

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Mr. Abrams conducted a survey of 355 students. 72% of them said that they study for tests. How many students said they study for
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Exact Answer : 255.6

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Harry drives 60 miles in 2 hours. At this rate, how far will he drive in 3 hours?
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<u>90 miles</u>

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Step-by-step explanation:

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A consumer advocacy group wants to determine whether there is a difference between the proportions of the two leading automobile
podryga [215]

Answer:

The answer is "0.3206".

Step-by-step explanation:

H_0: p_1 = p_2\\\\H_a: p_1 \neq  p_2\\\\\hat{p_1} = \frac{X_1}{N_1} = \frac{53}{400} = 0.1325\\\\\hat{p_1}= \frac{X_2}{N_2} = \frac{78}{500}= 0.156\\\\\hat{p} = \frac{(X_1 + X_2)}{(N_1 + N_2)} = \frac{(53+78)}{(400+500)} = 0.1456

Testing statistic:

z = \frac{(\hat{p_1}- \hat{p_2})}{\sqrt{(\hat{p} \times (1-\hat{p}) \times (\frac{1}{N_1} + \frac{1}{N_2}))}}

=\frac{(0.1325-0.156)}{\sqrt{(0.1456\times (1-0.1456)\times (\frac{1}{400} + \frac{1}{500}))}}\\\\ = -0.99

Calculating the P-value Approach

\text{P-value}= 0.3206

7 0
3 years ago
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