Can someone who likes to help algebra? Thanks!?
Questions: 1. Sara leaves home at 7 AM to travel at a speed of 45 m / h. Your child discovers that she has forgotten his briefcase and begins to catch up with her. His son leaves at 7:30 am traveling at a speed of 55 km / h. What time will exceed his mother to him? 2. With the wind, an airplane travels 2200 miles in four hours. Against the wind, it takes 5 hours to travel 2350 miles. Finding the wind rate and the rate of aircraft in still air. Thanks!
Distance = rate * time … what I refer to as the formula DiRT! if your travel time is t, and his son was 30 minutes later, then he was in the car for 30 minutes less … 1 / 2 hours less for both T-half has a chart to help: who – tax – time – distance sara – 45 – t – 45t son – 55 – t – 5-55 (t-. 5) Want to know when it has traveled the same distance, so set the distances between them equal to: 45 t = 55 (t – 0.5) -> Distribute 45t = 55t – 55 *. 5 – subtract> from both sides 55t 45t – 55t = -27.5 -> combine like terms-10t =- 27.5 -> multiply by -2 t = 2.75 – divide> -10 So 2 hours and 45 minutes before 7 to 9:45 2.When d rt = r = d / t type of aircraft in the air still is S while the rate of wind is the wind W to it —– —- —- — Time rate distance S + W — 4 — 4 (S + W) = 2200 against —- S – W — – 5 — 5 (S – W) = 2350 4 (S + W) = 2200 -> S + W = 550 5 (S – W) = 2350 -> S – W = 470 -> Add equations 2S = 1020 – divide> by 2 S = 510 so that the rate of air is 510 mph and the wind would be 510 w + w = 550 = 40 mph
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