1) A $12 calculator has a discount of 25%. What is the sale price? 2) You tip your waiter 32% on a $45 bill. What is the total amount you pay?

3) To rent a car, there is a 15% daily tax. If the daily rental fee is $30, how much is the tax for 4 days?

4)For a food deliver, you tip 18% on a $55.00 bill. How much is the tip?

Step-by-step explanation:

1 percent off 12.00 is 11.88The difference is 0.12

25 percent off 12.00 is 9.00The difference is 3.00

26 percent off 12.00 is 8.88The difference is 3.12

27 percent off 12.00 is 8.76The difference is 3.24

28 percent off 12.00 is 8.64The difference is 3.36

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

this is answer of 144 cubic meters