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4 years ago

Any Quetion in the steps to solve it are shown below:

1 answer:

3 0

I'm pretty sure it was Step One. When you multiply -1/4, I don't think the symbol is supposed to change to an addition sign. It's supposed to still be a minus sign.

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A married couple wishing to file their taxes jointly, claim their children, as well as medical expenses must file their taxes us

Leto [7]

Answer:

I believe it is a 1040 tax form

Step-by-step explanation:

3 0

4 years ago

Suppose the time a child spends waiting at for the bus as a school bus stop is exponentially distributed with mean 7 minutes. De

Gala2k [10]

Answer:

The probability that the child must wait between 6 and 9 minutes on the bus stop on a given morning is 0.148.

Step-by-step explanation:

Let the random variable X represent the time a child spends waiting at for the bus as a school bus stop.

The random variable X is exponentially distributed with mean 7 minutes.

Then the parameter of the distribution is, $\lambda=\frac{1}{\mu}=\frac{1}{7}$ .

The probability density function of X is:

$f_{X}(x)=\lambda\cdot e^{-\lambda x};\ x>0,\ \lambda>0$

Compute the probability that the child must wait between 6 and 9 minutes on the bus stop on a given morning as follows:

$P(6\leq X\leq 9)=\int\limits^{9}_{6} {\lambda\cdot e^{-\lambda x}} \, dx$

$=\int\limits^{9}_{6} {\frac{1}{7}\cdot e^{-\frac{1}{7} \cdot x}} \, dx \\\\=\frac{1}{7}\cdot \int\limits^{9}_{6} {e^{-\frac{1}{7} \cdot x}} \, dx \\\\=[-e^{-\frac{1}{7} \cdot x}]^{9}_{6}\\\\=e^{-\frac{1}{7} \cdot 6}-e^{-\frac{1}{7} \cdot 9}\\\\=0.424373-0.276453\\\\=0.14792\\\\\approx 0.148$

Thus, the probability that the child must wait between 6 and 9 minutes on the bus stop on a given morning is 0.148.

6 0

3 years ago

An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and hav

Ierofanga [76]

Answer:

$P(Yellow) = \frac{29}{147}$

Step-by-step explanation:

Given

$Brown = 27\\Purple = 47\\Yellow = 29\\Green = 44$

Required

$P(Yellow)$ --- next roll to be yellow

This is calculated as:

$P(Yellow) = \frac{Yellow}{Total}$

So, we have:

$P(Yellow) = \frac{29}{27 + 47 + 29 + 44}$

$P(Yellow) = \frac{29}{147}$

7 0

3 years ago

Help with the area please

Gnoma [55]

i think its 58 or 70 sorry if i am wrong

Step-by-step explanation:

7 0

4 years ago

Read 2 more answers

A group of 18 people ordered soup and sandwiches for lunch. Each person in the group had either one soup or one sandwich. The sa

Black_prince [1.1K]

X - the number of sandwiches
y - the number of soups

$x+y=18 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\times (-4.5) \\
7.75x+4.5y=113.5 \\ \\
-4.5x-4.5y=-81 \\
\underline{7.75x+4.5y=113.5} \\
7.75x-4.5x=113.5-81 \\
3.25x=32.5 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\div 3.25 \\
x=10$

10 sandwiches were ordered. The answer is D.

6 0

3 years ago

Read 2 more answers