Why dont my questions get answered

subtract polynomials

(6x^2-7x+8) - (2x^2+4x-3)

A serving of raisin bread has 3 grams of fat and 150 calories. What percent of calories are from fat? Remember, there are 9 calories per gram of fat.

If the radius of a hemisphere is 8 meters, find the volume of the hemisphere to the nearest hundredth

The square of a positve number id 24 more than 5 times the number. what is the value of the number?

Find the center and radius of the circle with equation (x-7) 2 + (y-5) 2=4

6 times a number plus 21 is greater than 6 A. 6 x plus 21 greater than 6 B. 6 x plus 21 less than or equals 6 C. 6 x plus 21 greater than or equals 6 D. 6 x plus 21 less than 6

A merry go round revolves 2 times per minute, jack is 10 feet from the center while bob is 14 feet from the center

An office uses 478 lb of paper one week. The paper comes in packages that hold 18 lb of paper each. How many packages of paper does the office use each month?

In an AP the seventh term is 38 and the twelfth term is 63. What is the sum of the first twenty terms?

Grandma has 14 red roses and 7 pink roses. How many more red roses than pink roses does she have?

What is the volume of a rectangular prism whose edges measure 3 ft, 3 ft, and 2 ft? 8 ft3 22 ft3 11 ft3 18 ft3