$+\left\{\begin{array}{ccc}a+b=76\\a-b=38\end{array}\right\\-----------\\.\ \ \ \ \ \ \ 2a=114\ \ \ \ \ |:2\\.\ \ \ \ \ \ \ \ \ \ a=57\\\\57+b=76\\b=76-57\\b=19\\\\\frac{a}{b}=\frac{57}{19}=\fbox{3}$

4 0

4 years ago

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The number of potato chips in a bag is normally distributed with a mean of 74 and a standard deviation of 4. Approximately what

tangare [24]

Answer: 99.7 % of the bags contain between 62 and 86 potato chips.

Step-by-step explanation:

The standard deviation given is 4.

Find the difference between the given numbers and the mean,

74-62= 12 . 86-74=12

then divide 12 by 4 to find the number of standard deviations: 12/4=3

Check a chart or diagram of the Gaussian Distribution to find that 99.7% of the samples lie within 3 standard deviations from the mean.

4 0

3 years ago

Write an equation for the line graphed.

Kay [80]

Answer:

the answer is "d" because the x region is negative 2 and the y region is a positive1

6 0

3 years ago

I failed to use the cos and sin rule ​

I failed to use the cos and sin rule