Hey can you please help me posted picture of question

Mathematics

1 answer:

Snezhnost [94]3 years ago

3 0

The equation for a parabola can also be written in the "vertex form":
y = a (x - h) ^ 2 + k
In this equation, the vertex of the parabola is the point (h, k).
We have then:
y = a (x - (-5)) ^ 2 + -2
Substituting the given point:
2 = a (-4 - (-5)) ^ 2 + -2
Clearing a:
2 = a-2
a = 4
Answer:
a = 4
option B

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diamong [38]

The given equations are:

5x - 2y = 88
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Multiplying the 1st equation by 2, we get the new set of equations as:

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Using the value of x in 1st equation, we get:

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3 years ago

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Katarina [22]

Answer:

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We can model this question with:

9 = 0.04x

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0.04x = 9.

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9 ÷ 0.04 = 225.

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ludmilkaskok [199]

Answer:

a) 40.13% probability that a laptop computer can be assembled at this plant in a period of time of less than 19.5 hours.

b) 34.13% probability that a laptop computer can be assembled at this plant in a period of time between 20 hours and 22 hours.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

$\mu = 20, \sigma = 2$