One small water hose takes twice as long to fill the small basin as the

Janet and Joe begin biking at the same time and arrive at the 50-mile mark at exactly the same time. How many minutes has it taken them ? Exercise 3. What is ...
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1SE1-SE2 HOMEWORK n°2 for Monday, november 4th Exercise 1

One small water hose takes twice as long to fill the small basin as the larger water hose. If the two hoses take 40 minutes to fill the basin how long would it have taken each hose to individually fill the basin? Exercise 2

Joe bikes at a constant rate and stops for a five-minute break at the end of every mile. Janet bikes at a constant rate which is three-quarter the rate that Joe bikes, but Janet takes a fiveminute break at the end of every two miles. Janet and Joe begin biking at the same time and arrive at the 50-mile mark at exactly the same time. How many minutes has it taken them ? Exercise 3

What is the product of the real roots of the equation x²  18 x  30  2 x²  18 x  45

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Exercise 4

A plane flew to the New-york City and back. It took one hour less time to get there than it did to get back. The average speed on the trip there was 220 mph. The average speed on the way back was 200 mph. How many hours did the trip here take Exercise 5

The height of an object dropped, thrown or fired can be computed using quadratic equations. The general formula is h = – 16 t 2 + v 0 t+ h 0 , where h is the object’s height (in feet), t is time (in seconds),h 0 is the object’s initial height (that is, its height at t = 0 seconds) and v 0 is the object’s initial velocity (that is, its speed at t = 0 seconds) in feet per second. If the object is tossed, thrown, or fired upward, v 0 is positive. If the object is thrown downward, v0 is negative. If the object is dropped, v 0 is zero. The object reaches the ground when h = 0. (The effect of air resistance is ignored.) Sound travels about 1125 feet per second in air What is the difference between the depths of two wells, into each of which should a stone be dropped at the same time, the first splash being heard after 6 seconds, the second after 10?