the cost price of a box and a pen is rs 80.the box is sold at 10%profit and the pen is sold at 10%loss .if the selling price of the box is rs 28 more than of the pen, calculate the profit or loss %inthe whole.

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?