Answer:
.
Step-by-step explanation:
The 3 angles must add up to 360 degrees
Only 1 and 4 fit the bill.
Answer:
a the assumption is that after the 60% discount, the 20% will contribute to the old price, not the adjusted price
b this is incorrect because the 20% discount will be added on after the 60% discount has been used
c the 500 dollars would turn to 100 dollars
d 40
e it would be best to first apply the 60% coupon first over the 20% coupon
The other 6 books can be arranged in 6 ways
= 6*5*4*3*2*1 = 720 ways answer
