All categories

2 years ago

If the mean of the following distribution is 91 and sum of frequencies is 150 find x and y

Mathematics

1 answer:

nydimaria [60]2 years ago

7 0

Answer:

Step-by-step explanation:

Mean = ∑x/ N

91 = ∑x / 150

∑x = 150 * 91 = 13650

x= 6825 and y = 6825

You might be interested in

Select the correct answer from each drop-down menu.

kvasek [131]

Answer:

1. The total number of students in the 25-34 age group

2. 2124/19558*100= 10.9 %

3 0

2 years ago

Read 2 more answers

Cole is studying employment trends.

natali 33 [55]

Answer:

225

Step-by-step explanation:

So we know that 20% of the social workers he surveyed was 45 people. The easiest way to find all 100% of the social workers is to do 45 x 5 because 20% x 5 = 100%. So 45 x 5 = 225.

Hope this helped! :)

3 0

2 years ago

A boat sails on a bearing of 77 degrees for 135 miles and then turns and sails 207 miles on a bearing of 192 degrees. Find the d

Andrew [12]

Answer:

193.53 miles

Step-by-step explanation:

Please see the diagram for understanding of how the angles were derived,

Applying Alternate Angles, ABO =77 degrees

The bearing from B to C is 192=180+12 degrees

Subtracting 12 from 77, we obtain the angle at B as 65 degrees.

We want to determine the boat's distance from its starting point.

In the diagram, this is the line AC.

Applying Law of Cosines:

$b^2=a^2+c^2-2acCosB\\b^2=207^2+135^2-2(207)(135)Cos65^\circ\\b^2=37453.8654\\b=\sqrt{37453.8654} \\b=193.53\: miles$

The distance of the boat from its starting point is 193.53 miles (correct to 2 decimal places).

6 0

3 years ago

the water level in a swimming pool increased from 4.5 feet to 6 feet what is the percent increase in the water level rounded to

yuradex [85]

The answer would be twenty five percent because four and one half is equal to seventy-five percent and one hundred minus seventy-five would be twenty-five.

8 0

3 years ago

Drag an expression to the box to create an equation with NO solutions.

irina [24]

The answer will be the last one as it equals 4x + 3. this means that the equation will be parallel and does not have a solution.

7 0

2 years ago