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3 years ago

Help me help me help me help me help me help me help me help me help me

Mathematics

2 answers:

kirza4 [7]3 years ago

6 0

Answer:

a) x=7

b) x=4

c) x= 1/9

I hope this helps! Do you need more help?

AysviL [449]3 years ago

3 0

Hi it's Mia! '^' Give the other person brainliest, They worked hard to get the answer you needed! Have a wonderful day! :)

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Which function has the greatest rate of change?

Ilia_Sergeevich [38]

The rate of change is the slope...and in y = mx + b form, the slope is in the m position. So we need to put the equations in y = mx + b form.

A. 6x - 7y = 21
-7y = -6x + 21
y = 6/7x - 2....so the slope here is 6/7 or 0.857

B. y = 2x - 2....this is already in the form we need...the slope is 2

C. (2,7)(3,13)
slope = (13-7) /(3-2) = 6/1 or just 6

the slope with the greatest rate of change is gonna be the one with the highest slope......and that would be C.

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Vlad [161]

It is just 60 dividdd by 8

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3 years ago

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You have 20 apples in a basket. 20 children come to you and each one of them ask for an apple. You want to give all the apples t

Firdavs [7]

<span>Give all the 19 apples to each one of them and give the basket to the last child with the apple still inside it.</span>

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3 years ago

The life of light bulbs is distributed normally. The standard deviation of the lifetime is 25 hours and the mean lifetime of a b

riadik2000 [5.3K]

Answer:

0.9699 = 96.99% probability of a bulb lasting for at most 637 hours.

Step-by-step explanation:

Problems of normally distributed samples are solved using 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 problem, we have that:

$\mu = 590, \sigma = 25$

Find the probability of a bulb lasting for at most 637 hours.

This is the pvalue of Z when X = 637. So

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

$Z = \frac{637 - 590}{25}$

$Z = 1.88$

$Z = 1.88$ has a pvalue of 0.9699

0.9699 = 96.99% probability of a bulb lasting for at most 637 hours.

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3 years ago

The answer is 144 but how?

Levart [38]

The angles around the point a total 360°
the lines AB and AC make a sector of the circle.
we are told that the circumference of that sector is 2/5 of the total circumference
so 360/5 ×2 =144

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4 years ago

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