Answer:
10 desserts
Step-by-step explanation:
For this question, in order to find all the combinations of desserts, you need to multiply the sizes, flavors, and toppings together.
See:

10 desserts
Answer:
7/8
Step-by-step explanation:
Y = -8x - 5/4......slope here is -8 or -8/1
y = 1/8x + 4/5...slope here is 1/8
what u have here are negative reciprocal slopes....negative reciprocal of a number can be found by flipping the number and changing the sign. So the negative reciprocal of -8/1 is 1/8 (see how I flipped the number and changed the sign)...and when u have negative reciprocal slopes, this means that ur lines are perpendicular.