What is the mean of the data set? {21, 23, 25, 25, 26, 28, 28, 28, 31, 33}

A.26.8

B.27

C.27.8

D.28

Which linear equations have an infinite number of solutions? check all that apply.  (x  –  3/7)  =  2/7(3/2x  –  9/14)8(x  +  2)  =  5x  –  1412.3x  –  18  =  3(–6  +  4.1x)(6x  +  10)  =  7(x  –  2)4.2x  –  3.5  =  2.1 (5x  +  8)

The graph of which equation includes the points (0, 10) and (10, 11)? y = 10x + 11 y = x + 10 y= 1/10x + 10 y = 1/10x + 11

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals