Answer this question:Erin is sorting through the library books to decide which ones to replace. She finds 8 less than 6 times as many obsolete books as damaged books. If she removes 69 books total, how many books were damaged?
Let o be the number of obsolete books and d be the number of damaged books. We know that o + d = 69 and o = 6d - 8. Substituting the first equation into the second equation, we get 6d - 8 + d = 69. Combining like terms, we get 7d - 8 = 69. Adding 8 to both sides, we get 7d = 77. Dividing both sides by 7, we get d = 11.
The answer is 11.

Answer this question:Ivy drinks 2.5 liters of water each day. How many bottles of 2-liter water should Ivy buy for her 4 days consumption?
For 4 days, Ivy consumes 2.5 x 4 = 10 liters of water. So Ivy should buy 10 / 2 = 5 bottles of 2 - liter water.
The answer is 5.

Answer this question:Jackie can do 5 push-ups in 10 seconds. How many push-ups can she do in one minute if she takes two 8-second breaks?
There are 60 seconds per minute, so Jackie’s push - up routine takes 1 * 60 = 60 seconds. Her breaks last 2 * 8 = 16 seconds. She does push - ups for 60 - 16 = 44 seconds. She can do a push - up in 10 / 5 = 2 seconds. Therefore, Jackie can do 44 / 2 = 22 push - ups in one minute with breaks.
The answer is 22.

Answer this question:Josie's mom gave her a $20 bill and asked her to go to the store for a few items. The list included a carton of milk for $4.00, a loaf of bread for $3.50, a box of laundry detergent for $10.25 and 2 pounds of bananas that were $0.75 per pound. Her mom also gave her a coupon for $1.25 off of the laundry detergent. At checkout, the clerk told her the milk was 1/2 off today. How much money did Josie have left over after she bought all of the groceries?
The milk cost $4.00 but was on sale for 1 / 2 off so 4 * .50 = $2.00. She bought 2 pounds of bananas at $0.75 per pound so 2 * .75 = $1.50. She had a $1.25 coupon off of laundry detergent so 10.25 - 1.25 = $9.00. When you add all of her purchases together then 2 + 1.50 + 3.50 + 9.00 = $16.00. She paid with a $20 bill so 20 - 16 = $4 left over.
The answer is 4.