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Paha777 [63]
3 years ago
8

When a < 0 in the quadratic function y = ax2 + bx + C, the graph of the quadratic function opens _____?

Mathematics
1 answer:
ziro4ka [17]3 years ago
5 0

Answer:

downwards

Step-by-step explanation:

Given the quadratic function in standard form

y = ax² + bx + c ( a ≠ 0 )

• If a > 0 then the graph opens upwards

• If a < 0 then the graph opens downwards

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Answer:

The responsess to the given question can be defined as follows:

Step-by-step explanation:

P(medication\ used) = 0.007 \\\\P( drug \not\ used ) = 1 - 0.007 = 0.993\\\\P(test\ positive  | medication \ used) = 0.96 \\\\ P(test \ negative | medication \ used) = 1 - 0.96 = 0.04\\\\

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As per the given info we draw the tree diagram which is defined in the attachment file.

P ( test \ is\  positive ) = P( medication \ used ) \times P( Test \ positive | medication \ used ) + P( medication not \ used ) \times  P( Test\ positive | medication \ not \ used )

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P( medication \ used | test\ positive )= \frac{\textup{P( medication used ) *P( Test positive given medication  used )}}{\textup{P( medication used )}}  

= \frac{( 0.007\times 0.96 )}{0.0762}\\\\= 0.0882

8 0
3 years ago
The probability that a certain machine will produce a defective item is 0.20. if a random sample of 20 items is taken from the o
GenaCL600 [577]
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=1-(0.0115292+0.057646+0.136909)
=1-0.206085
=0.793915
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3 years ago
Read 2 more answers
(a) Find the standard error of the mean for each sampling situation (assuming a
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a

Step-by-step explanation:

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