"if parallel lines have a transversal, then corresponding angles are congruent." on the fence, lines a and b are parallel and line c is a transversal. how many pairs of corresponding angles are available on the picture to use to prove the theorem? which given pair of angles can be used? a) 2 pairs; ∠5 and ∠1; b) 2 pairs; ∠5 and ∠7; c) 4 pairs; ∠2 and ∠4 d) 4 pairs; ∠3 and ∠5;

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?