Luis' father is four times as old as luis. his grandfather is twenty years older than his father. the sum of their three ages is 110. how old is luis father?

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)

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Solutions for 2x+7 less than or equal to 3x-5