Maura writes an expression equivalent to 8a-(-3-5a)-2a. Her work is shown below. 8a-(-3-5a)-2a Step 1: 8a+3-5a-2a Step 2: (8a-5a-2a)+3 Step 3:(3a-2a)+3 Step 4: a+3 In what step does Maura make a mistake? Describe her error and find the correct equivalent expression.

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?