Answer:
I'm assuming you meant arithmetic progression. If the common difference is d and because 18 - 8 = 10 we can write 17 + 10d = 13. Solving for d we get d = -0.4 or -2/5.
-10
Step-by-step explanation:
75
She forgot to flip the inequality sign when dividing both sides by -4
Answer: 480
8x6x10=480
48x10
480
