What’s the mean i’m really dumb and can’t do it x

Multiply the values across the rows. So you'll multiply each mark with its corresponding frequency

6*5 = 30

7*4 = 28

8*7 = 56

9*10 = 90

10*4 = 40

Then add up those results

30+28+56+90+40 = 244

Finally, you divide by 30 since this is the total number of scores (add up everything in the second column of the original table to get 30)

So we end up with the mean being 244/30 = 8.133 approximately

Round that value however you need to.

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

q1 a person or thing situated away or detached from the main body or system. a cluster is a a mash of many things.

q2 do

step-by-step explanation: