At the Valentine’s Day Dance, 20% of the students there were 6th graders. If there was a total of 168 6th graders at the dance, how many total students were there?

The total amount of kids at the dance is 840

Step-by-step explanation:

100/20 equals 5

168 x 5 = 840

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c