What is the mean number of bedrooms per house.
please answer as soon as possible

  2.7

Explanation:

To find the mean, we add up the numbers and divide by the number of items in the set.

For example, the mean of {1,2,6} is 3 because (1+2+6)/3 = 9/3 = 3.

Unfortunately, we don't know how many rooms are in each terraced house. But we do know that the rooms in each terraced house adds to some variable S. Dividing it over 40 gets us the mean of 2.2 rooms per terraced house.

S/40 = 2.2

S = 40*2.2

S = 88

When considering the terraced houses only, there are 88 rooms in total.

Through similar steps, there are 50*2.9 = 145 rooms in the semi-detached houses

And there are 10*3.7 = 37 rooms in the detached houses.

Overall we have 88+145+37 = 270 rooms among the 100 houses total.

The mean number of rooms when considering all three types of houses is 270/100 = 2.7 rooms per house.

Another approach:

2.2 is the mean number of rooms for the terraced houses

this represents 40/100 of the entire list

So we'll have (40/100)*2.2 as part of the calculation.

We'll also have (50/100)*2.9 and (10/100)*3.7

The final calculation can be done as this:

(40/100)*2.2 + (50/100)*2.9 + (10/100)*3.7 = 2.7

For more information, check out the concept of a weighted mean.

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

the correct answer is a.) bc< mn 5 stars if this you : )

step-by-step explanation: