3 years ago

Consider the following formula.

Mathematics

1 answer:

icang [17]3 years ago

6 0

Answer:

= (z-y)/(a-b)

Step-by-step explanation:

ax-bx + y =z

ax-bx =z -y

x (a-b) = -y

x = (z-y) / (a-b)

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Candace used 5/8 of her savings to buy a $531.25 laptop. How much did she have in savings before purchasing the laptop?

Serjik [45]

$x-savings\\\\\frac{5}{8}x=531,25\ \ \ \ |\cdot\frac{8}{5}\\x=850\\\\Candance\ had\ \$ 850\ savings.$

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3 years ago

Candice is preparing for her final exam in Statistics. She knows she needs an 74 out of 100 to earn an A overall in the course.

Salsk061 [2.6K]

Answer:

Hence the correct option is option b) Yes, the upper level of one standard deviation is 72.

A score of 74 is not within one standard deviation of the mean.

Step-by-step explanation:

Here the given details are,

Mean = 68

SD = 4

Distribution is normal.

Z-score for x = 74 is given as below:

$Z = (X - mean)/SD\\Z = (74 - 68)/4\\Z = 1.5$

So, the score of 74 is 1.5 standard deviations from the mean.

$Mean + 1\timesSD = 68 + 1\times4 = 72Mean - 1\timesSD = 68 - 1\times4 = 64$

Therefore the score is not lies between 64 and 72.

Yes, the upper level of one standard deviation is 72.

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3 years ago

Which conversion is correct?

jonny [76]

.75 75% 3/4 is the correct answer

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2 years ago

4. You and a friend go to the movies and split the cost of the movie tickets and snacks. You pay the bill. You tell your friend

tigry1 [53]

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On the coldest night in Oymayakon, Russia, the temperature dropped from 0°C to −20°C in 5 hours. What is the average temperature

Andrej [43]

it dropped from 0 to -20

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divide by the time of 5 hours

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