Joel has twice as many cds as mariella has. subtracting 7 from the number of cds joel has and dividing by 3 equals the number of cds blake has. if blake has 25 cds, how many cds does mariella have?

J = number of cd's joel has
m = number of cd's mariella has
b = number of cd's blake has

from problem statement, develop equations:
j = 2m
b = (j - 7)/3 = 25
m = ?

solve for m

b = 25 = (j - 7)/3
25 = (j - 7)/3
25*3 = j - 7
75 + 7 = j
j = 82

j = 2m =  82
m = 82/2
m = 41

thus
mariella has 41 cd's
joel has 82 cd's
blake has 25 cd's

Where the white dots are is where your points should be plotted.a translation is simply just moving something from one place to another. in this case, you would move each plot point of the original shape 2 units up, and 5 units to the left.