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Pani-rosa [81]
3 years ago
5

There is a bag of 50 marbles.

Mathematics
1 answer:
Rainbow [258]3 years ago
4 0

The answer may be \frac{12}{9}

Step-by-step explanation:

You might be interested in
A restaurant would like to evaluate the efficiency of its workers, so they observe the workers during the second shift.
Ksivusya [100]

Answer:

1.) It is biased

2.) No

3.) Yes

4.) No

Step-by-step explanation:

1.) It is biased  as it is predisposition to one particular outcome over another.

2.) No, because biased in research leads to unrepresentative outcomes as the estimates is predisposed to the left or to the right of the true values.

3.) Yes. Since the selection of shift has an equal probability of being chosen.

4.) No. The probability that the sample  accurately reflects the efficiency of the workers, the standard should be 95%.

4 0
3 years ago
On which interval is the function increasing? ​
sukhopar [10]

Answer:

b. (-1,0)\cup (1,\infty)

Step-by-step explanation:

The graph can be divided into 4 regions.

Region 1 is for x\in (-\infty,-1)

Region 2 is for x\in (-1,0)

Region 3 is for x\in (0,1)

Region 4 is for x\in (1,\infty)

So, for the region 1, the values of y goes on decreasing with increasing x. Therefore, the function is decreasing in the interval (-\infty,-1).

Now, for the region 2, the values of y increases with increasing x. So, the function is increasing in the interval (-1,0).

For the region 3, the the values of y goes on decreasing with increasing x. Therefore, the function is decreasing in the interval (0,1).

Now, for the region 4, the values of y increases with increasing x. So, the function is increasing in the interval (1,\infty).

Therefore, regions 2 and 4 are the regions when the function is increasing.

Hence, the correct option is b. (-1,0)\cup (1,\infty)

8 0
3 years ago
​If \left| OA\right| =5∣OA∣=5 and \left| OA'\right| =7.5∣OA ′ ∣=7.5, what is the scale factor, rr, of this dilation?
Igoryamba

Answer:

The scale factor is 1.5

Step-by-step explanation:

Given

\left| OA\right| =5

\left| OA'\right| =7.5

Required

Determine the scale factor

The scale factor (k) is calculated using:

k = \frac{\left| OA'\right|}{\left| OA\right|}

Substitute values for OA and OA'

k = \frac{7.5}{5}

k = 1.5

<em>The scale factor is 1.5</em>

6 0
4 years ago
In triangle abc angle a = 40◦, side b = 11 and side c = 5. use the cosine rule to find the length of side a, to two decimal plac
Sonbull [250]
A^2 = b^2 + c^2 - 2bc cos a

    = 11^2 + 5^2 - 2*5*11 cos 40

   =  7.86 to 2 DP's

to find the remaining angles use the sine rule:-
a / sin A = b / sin B so

7.857/ sin 40 =  11 / sin B
sin B = 11 sin40 / 7.857 = 0.8999

<B = 64 degrees 

so <C = 180 - 64-40  =  76 degrees
5 0
3 years ago
Could someone please help answer this, will give brainliest, please no spam, thank you (homework help)!!!
kotykmax [81]

Answer:

(51, 26) x-y=25 and so on

(47,33) 2x-3y=-5 and so on

(-17, -36) x-y=19 and so on

(-31, -56) 2x-y=-6 and so on

Step-by-step explanation:

8 0
3 years ago
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