Answer: It should cost $5
Step-by-step explanation:
First you have 4 hardcover and 2 softcover, so 4x+2y= $24 and for your friend it would be 3x+3y= $21.
You have
(3x+3y)2 = 72
(4x+2y)3 = 42
Then subtract them which is 30 you would divide by 6 since 3x2=6
Which gets you to 5.
He is incorrect because you can multiply unlike terms like y and x and you'll get xy but you can't add unlike terms like 13x+16y is the simplest it can be.
30,398.40. I think 6.85%-6.475%=0.375%x3/30. Then $340,000- the numbers.
Ignore the fraction bar. The plus and minus sign is a plus over a minus. It means that the 5 is either added or subtracted from 350 for the actual temperature
The quotient of 45 divided by 5 is 9
