Ted bought seven cds. a week later half of all his cds were destroyed in a fire. there are now only 15 cds left. with how many did he start?

Brent wants to know what is 5 x 1/2

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?