Decreasing 40 to 20 is the same as decreasing 40 by one-half of. So, it is a 50% decrease.

What is "the ratio of a line's rise over its run?"

What is the product of 8 * 7?

What is the width of my pond if it holds 7.35m3, it is 4.2m long and 50cm deep

Enter the first 8 terms of the sequence with f (1) = 42 and f (n) = f (n - 1) - 5 for each whole number greater than 1.

In a recent poll, 35% of survey respondents said that, if they only had one child, they would prefer the child to be a boy. Suppose you conducted a survey of 160 randomly selected students on your campus and find that 73 of them would prefer a boy.

Show work? |5x+10|=-7

Meg lives in Indianapolis and wants to visit her mom in Lima. She has been meaning to go to a chiropractor in Dayton, so she is wondering whether it makes sense to stop there on the way.

An advertisement states that a can of paint will cover 480 square feet. How many gallons of paint are needed to cover 1,680 square feet?

Mrs McDonald spent 24.65 at a yard sale on Saturday. on Sunday she went to another sales and spent 14.95 more than she did on Saturday. what is the total amount that Mrs McDonald spent on both yard sales

Linda purchase a prepaid phone card for $30. Long distance calls cost $.17 a minute using this card when do use her card. Linda use her card only to make a long distance call if the remaining credit on her card is $22.