3 doughnuts and 2 cakes costs £7. 5 doughnuts and 4 cakes costs £13.
Find the cost of a doughnut.
Find the cost of a cake.

cost of the doughnut = 1

cost of the cake =2

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

all you have to do is multiply them both to see how many out comes you can put:

3 x 2 = 6

you can make 6 diferent combinations of crusts and toppings.

~batmans wife dun dun