Giving 20 points not alot but it's something :3 right aslo Hurry Which expressions are equivalent to 30(1/2x-2)+40(3/4y-2) ?
a.45xy-220
b.15x-30y-200
c.15x+30y-200
d.15x+30y-64

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?