If y represents the price of the DVD before the tax. Then price with tax would be y + 0.07y = $22.90. Therefore 1.07y=22.90, or y= 22.90/1.07=$21.40. Be careful not to just take 7% of $22.90 and subtract. That is incorrect.
To find the percent of increase, subtract the second number from the original/first number (13.5-12.5=1.0) and divide that result by the original number (1/12.5=0.08=8%)
3 1/2 feet x 12 in/ft= 42 inches. 42 inches/1.75 inches = 24 bricks
2 1/2 x 60 = 150
12 feet x 18 feet is equivalent to 4 yards x 6 yards = 24 sq yards. 24 square yards x $3/sq yard = $72. Remember 3 feet = 1 yard, but 9 sq feet = 1 sq yard.
First, convert 6:15 PST to 9:15 EST. The flight then took from 9:15 pm EST to 2:45 am EST. That means that the flight took 5 1/2 hours
The car will have used 12 gallons (384 miles/32 gallons). Therefore, there will be 3 gallons left in the tank (15 gallons - 3 gallons)
20% of $28 = 28x0.2=$5.60. The sales price is then $28-$5.6 = $22.40
The toll of $4.25 includes $2 for the driver/car. So $2.25 ($4.25-$2) is left for the passengers. $2.25/0.75 = 3 passengers, so the total amount of people in the car is 1 driver and 3 passengers.
You need to apply the discounts successively not just add the discounts. So $125 x 80% = $100 (price after original 20% discount). $100 x 70% = $70 the price after the 2nd 30% discount.
