Point Slope form and Slope Intercept
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John and Carl are barbers, John can cut 5 peoples hairs per hour, Carl can cut 4 people hairs per hour. Carl came in earlier and cut 4 peoples hairs. When will John and Carl Have the same amount of hair cut?
y=5x y=3x+4 5x=3x+3 -3x 2x=4 /2 x=2
y=5(2) y=10 y=3(2)+4 y=6+4 y=10
Billy and Bobby are both selling pies. In 3 hours, Billy sold 6 pies. But Billy sold 5 pies before Bobby came out. In 5 hours, Bobby sold 15 pies. When will they both have had sold the same amount of pies?
y=3x y=2x+5 3x=2x+5 -2x x=5
Bobby y-y1 = m(x-x1 ) y-15=3(x-5) y-15=3x-15 +15 y=3x
y=3(5) y=15 y=2(5)=5 y=10+5 y=15
Billy y-y1=m(x-x1 ) y-6=2(x-3) y-6=2x-6 +6 y=2x
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