Find the mean of the data set: 3, 5, 8, 4.

Mean is the average
3 +  5 +  8 + 4 = 20
20/4 = 5

Answer : mean = 5

You find the mean of a data set by adding all of the numbers togehter, then dividing the sum by the number of numbers in the data set. For example, if my data set was 1, 2, 3 and I had to find the mean, I would add 1, 2, and 3 together (6), then divide by three because that is how many number sere in the data set. My mean would be 2.

Work:  
3+5+8+4
8+12
20

20/4=5

Final  the mean is 5

What's the denominator

and y≤ -x +4 .

step-by-step explanation:

we are given a graph for system of inequalities.

in order to write the system of inequalities for the given graph, we need to find the inequality for each of the line separately.

let us find the slope of dotted line first.

taking two coordinates on the graph.

let us say (0,0) and (3,1).

let us find the slope of the line now.

slope of the dotted line would be =.

y-intercept of dotted line is y=0 only.

plugging slope m= and b=0 in slope-intercept form y=mx+b, we get

.

the line is shaded up of that dotted line.

therefore, for shading up we would take greater than inequality symbol > .

and because it's a dotted line we would take only > symbol in place of = sign in above equation of line.

therefore, inequality for dotted line would be

.

let us take two points (3,1) and (0,4) on the solid line.

slope of the solid line would be =.

for the solid line we have y-intercept b= 4.

plugging slope m= -1 and b=4 in slope-intercept form y=mx+b, we get

y = -1x + 4.

the line is shaded down of that solid line.

therefore, for shading down we would take less than inequality symbol < .

and because it's a solid line we would take ≤ symbol in place of = sign in above equation of line.

therefore, inequality for solid line would be

y≤ -x +4 .