Answer:
The more expensive book cost $90, the other two combined cost $60.
Step-by-step explanation:
x = cost of more expensive book
y = subtotal cost of the other books
x = 50% more than y, so x = 1.50y = 1.5y
x + y = total cost = $150
1.5y + y = 150
y = 150/2.5 = 60
x = 1.5y = 1.5(60) = 90
Answer:
Step-by-step explanation:
first you subtract 7 from 7 and 12
then you get 
(btw the variable always goes first with these problems)
so the final answer would be 
Hello there!
The formula is
N! = n(n -1)(n - 2)
Now all we have to do is replace N by 4
N! = 4(4-1)(4-2)
= (4)(3)(4-2)
= (12)(2)
= 24
Here you go, the answer is : 24
I hope this answer help! Good luck with your studies.
Answer:
aₙ = 6n - 6
Step-by-step explanation:
a1 = 6 x 1 - 6 = 0
a₂ = 6 x 2 - 6 = 6
