51:35
Liz is using the distributive property to evaluate the expression 27(36) by using friendlier numbers. Her work is shown below.

b) well because you get well

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

nope.   happens to me as well.

-aparri

2

step-by-step explanation: