The music store is having a 15% off sale on all classical music cds. lyell has a coupon for 20% off any classical music cd. how much will lyell save on a classical music cd that has a price of $23.99? a. $7.20 b. $7.68 c. $8.40 d. $9.60

b.

$7.68

Step-by-step explanation:

23.99 * 15%

23.99 * .15 = 3.60 off

23.99-3.60 =20.39 new price

now to use the coupon

20.39 * 20%

20.39*.20= 4.08 off

20.39 - 4.08 =16.31

23.99-16.31 = 7.68

He saved 7.68

step-by-step explanation:

first you will have to convert 3/4 into a decimal

which is .75

then you will have to divide 1.5 by .75

which is 2

no you have to divide

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.