Mary multiplied a number by -3. when she added the result to 6, she got 12. what is her number?

can you put the picture up?

step-by-step explanation:

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

step-by-step explanation: the answer for wha if rt is 10 centimeters long, and wha is st? it’s 6

oof

step-by-step explanation: