Matemáticas I

If a television is sold at a 25% profit, what percent of the sale price is the profit?

If the value of a number increased by 30% is 280, what is the value of that number increased by 35%?

The price of a refrigerator decreases by 20% and then by 25%. By what percent must be the price increase to reach the original price?

Select the correct answer

Select the correct answer

Select the correct answer

The average (arithmetic mean) of 12 numbers is 12. If 8 is subtracted from each of 8 of the numbers and 4 is added to each of the remaining 4 numbers, what is the new average?

The average (arithmetic mean) of 8 numbers is 14. If the average of 3 of these numbers is 4, what is the average of the remaining 5 numbers?

The average (arithmetic mean) of a, b, 9, 10, and 11 is 10. If ab = 51 and b > a, then a =

If the sum of 5 distinct negative integers is -15, then the greatest of these integers is

Answer

Answer

Answer

Maria’s fruit punch is halt water and half punch. If adding 24 ounces of water changes the water-to-punch ratio to 7:5, how many ounces of punch are there?

Skiing down a 120-meter slope takes 20 seconds. If climbing back up is done at a rate of 180 meters per minute, what is the average speed, in meters per second, for the round-trip?