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4 years ago

4. Simplify 9c + (8 + 3c). Justify each step.

Mathematics

1 answer:

Mars2501 [29]4 years ago

4 0

Answer:

Step-by-step explanation:

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The university police department keeps track of the number of tickets it write in a year. Last year the campus police wrote 1460

AlladinOne [14]

Answer:

Step-by-step explanation:

We are given that Ticket writing on campus follows a Poisson process.

Last year the campus police wrote 1460 tickets

So, $X \sim Poisson (1460 / year)$

1 year = 365 days

So, E(Y) = $\frac{1460}{365}=4$

So, the standard deviation of the number of tickets written per day by the campus police = $\sqrt{4} =2$

Hence the standard deviation of the number of tickets written per day by the campus police is 2

5 0

3 years ago

Select expression that is mathematically equivalent to xy−z+ (a - b) X c. y - 2 O

Elden [556K]

Question:

Select expression that is mathematically equivalent to

$\frac{x}{y-z} + (a-b)*c$

a) $x/y - z + (a - b) * c$

b) $x/(y - z) + (a - b) * c$

c) $x/y - z + a - b * c$

d) $x/(y - z) + a - b * c$

Answer:

$x/(y - z) + (a - b) * c$

Step-by-step explanation:

Given

$\frac{x}{y-z} + (a-b)*c$

Required

Determine its equivalent

Start by writing y - z in bracket;

$\frac{x}{y-z} + (a-b)*c$

becomes

$\frac{x}{(y-z)} + (a-b)*c$

When - is used as divide, it is equivalent to /

The given expression can then be rewritten as

$x/(y - z) + (a - b) * c$

Hence;

<em /> $\frac{x}{y-z} + (a-b)*c$ <em> is equivalent to </em> $x/(y - z) + (a - b) * c$ <em />

3 0

3 years ago

Which equation represents a line which is parallel to the line y=8/5x−1?

Murljashka [212]

Answer:

y=8/5x+2

Step-by-step explanation:

if parallel, the slopes should be the same

slope = 8/5

so the equation could be y=8/5x+2, or anything that is moved across the y axis with that slope

8 0

3 years ago

CAN SOMEONE PLEASE HELP

ahrayia [7]

Most likely 5/9, I’m pretty sure

6 0

3 years ago

Read 2 more answers

Write the equation of the circle that has a diameter with endpoints (6,-1) and (0,-7).

Yanka [14]

$d = \sqrt{(x_2 - x_1)^{2} + (y_2 - y_1)^{2}}$
$d = \sqrt{(0 - (-1))^{2} + (-7 - (-1))^{2}}$
$d = \sqrt{(0 + 1)^{2} + (-7 + 1)^{2}}$
$d = \sqrt{(1)^{2} + (-6)^{2}}$
$d = \sqrt{1 + 36}$
$d = \sqrt{37}$
$d = 6.083$

6 0

4 years ago

4. Simplify 9c + (8 + 3c). Justify each step. ​

4. Simplify 9c + (8 + 3c). Justify each step.