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3 years ago

IM DESPERATE! PLEASE PLEASE PLEASE PLEASE HELP!!!

Mathematics

1 answer:

Maslowich3 years ago

6 0

Answer:

1. Obtuse angle

2. Acute angle

3. Right angle

4. Right angle

5. Right angle

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The waiting times on hold for a call to a customer service department are observed to have the following probability distributio

Elina [12.6K]

Answer:

b. 9.2 minutes

Step-by-step explanation:

To find the expected waiting time for a random call from the sampie given by using the formula:

$\sum (f(X)) = \dfrac{\sum f (x) \times x}{\sum x}$

number of calls (x) waiting time f(x) in minutes f(x) *(x)

0 0 0

2 3 6

4 10 40

6 15 90

8 10 80

10 6 60

$\sum x = 30$ $\sum f(x) *x = 276$

Therefore:

$\sum (f(X)) = \dfrac{276}{30}$

$\sum (f(X)) = 9.2$

5 0

3 years ago

More than 2,500 people attended the convention

Advocard [28]

What convention had more than 2,500 people attending?

3 0

4 years ago

Read 2 more answers

I don’t understand how to solve this graph.<br> (Y=MX+B)

Alla [95]

Answer:

The equation of line shown in the graph is $\mathbf{y=-\frac{1}{2}x -1}$

Step-by-step explanation:

We need to find equation of the line shown in graph.

The equation of line will be in slope-intercept form $y=mx+b$ where m is slope and b is y-intercept.

We need to find slope and y-intercept.

Finding y-intercept

Looking at the graph, we can find y-intercept when x =0, the value of y is known as y-intercept.

So, when x =0, y=-1

So, y-intercept is -1

Finding Slope

Now, for finding slope, consider 2 points on graph

(0,-1) and (-2,0)

Slope can be found using formula: $Slope=\frac{y_2-y_1}{x_2-x_1}$

We have $x_1=0, y_1=-1, x_2=-2, y_2=0$

Putting values and finding slope:

$Slope=\frac{y_2-y_1}{x_2-x_1}\\Slope=\frac{0-(-1)}{-2-0} \\Slope=\frac{0+1}{-2-0} \\Slope=\frac{1}{-2} \\Slope=-\frac{1}{2}$

So, slope is $m=-\frac{1}{2}$

Equation of line

Now, equation of line having slope $m=-\frac{1}{2}$ and y-intercept b = -1 is

$y=mx+b\\y=-\frac{1}{2}x -1$

So, equation of line shown in the graph is $\mathbf{y=-\frac{1}{2}x -1}$

5 0

3 years ago

John and some friends went to a sushi restaurant and ordered some sushi. He bought 2 Ahi Tuna, 1 California Roll, and 1 Eel Roll

Andrew [12]

Answer:

Let "a" represent amount of ahi tuna, "c" represent California rolls, and "e" represent eel rolls.

John: 2a+c+e=26.20

Sally: 3c = 17.85

5 0

3 years ago

A market researcher obtains a list of all streets in a town. She randomly samples 10 street names from the list, and then admini

inessss [21]

Answer: Simple random sampling

Step-by-step explanation:

Given: A market researcher obtains a list of all streets in a town. She randomly samples 10 street names from the list, and then administers survey questions to every family living on those 10 streets.

Since she randomly samples street names , therefore the type of sampling is simple random sampling.

A simple random sample is a sample that is a subset of the population the researcher surveyed selected in a way such that all the individuals in the population has an equal chance to be selected.

5 0

3 years ago