SOLUTION: a laptop sells for $1100. a certain customer uses a 12% discount after which a tax of 9% is applied. how much will the customer spend? a certain vehicle can travel 125miles usin

Question 1155475: a laptop sells for $1100. a certain customer uses a 12% discount after which a tax of 9% is applied. how much will the customer spend?
a certain vehicle can travel 125miles using 6 gallons of fuel. how much gallons are required to make a trip of 1500miles?

the price of a certain stock is $900. in one month the stock rise by 30%.two months later it drops by 50%. what is the final price of the stock?
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
a laptop sells for $1100. a certain customer uses a 12% discount after which a tax of 9% is applied. how much will the customer spend?

1100 - .12 * 11100 = 968 = sale price.

968 * .09 = 87.12 = sales tax.

customer will spend 968 + 87.12 = 1055.12.

you first apply the discount and then you apply the sales tax on the discounted price.

a certain vehicle can travel 125 miles using 6 gallons of fuel. how much gallons are required to make a trip of 1500 miles?

1500 / 125 * 6 = 72 gallons.
you divide 1500 by 125 to get how many times you traveled 125 miles in 100 miles.
you then multiply that answer by 6 to get the number of gallons.
another way to do it is you divide 125 by 6 to get the miles per gallon and then you divide 1500 by the miles per gallon to get the number of gallons.
125 / 6 = 20.83333333... miles per gallon.
1500 / 20.83333333..... = 72 gallons.
still another way to do it is you divide 6 by 125 to get the gallons per mile and then you multiply 1500 by the number of gallons per mile to get the number of gallons.
6/125 = .048 gallons per mile.
1500 * .048 = 72 gallons.

the price of a certain stock is $900. in one month the stock rise by 30%.two months later it drops by 50%. what is the final price of the stock?

900 * (1 + .3) * (1 - .5) = 585.

the stock increases by 30% to become 900 * 1.3 = 1170.
1170 is then reduced by 50% to get 1170 * .5 = 585.

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