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100. Working together, Pat and Chris can complete a job in 6 hours. Working along, Pat can reseal the driveway in 15 hours. How long would it take Chris, working along, to reseal the driveway?

Rate

Time

Part of the job completed

Pat

6

Chris

6

1 job

101. Simplify

102. Multiply

103.   Simplify

104.  Simplify

105.   Solve.      [By taking square roots.]

106.  Solve and check,

107. The hypotenuse of a right triangle measures 20 in. One leg of the triangle measures

16 in. Find the length of the other leg of the triangle. (Show your work.)

109. A basketball player shoots at a basket 25 ft away. The height h of the ball above the ground at time t is given by . How many seconds after the ball is released does it reach 4 ft above the ground? (Hint: use h = 4 in the equation.)

110. A motorcycle traveled 150 miles at a constant rate before decreasing the speed by 15 mph. Another 35 miles was driven at the decreased speed. The total time for the 185-mile trip was 4 hours. Find the cyclist’s rate during the first 150 miles.

Distance

Rate

Time

Constant rate

150 miles

Decreased speed

35 miles

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