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Chapter 9: Q. 49 (page 870)
Solve quadratic equation using square root property
The values ofareand
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Gerry plans to place a 25-foot ladder against the side of his house to clean his gutters. The bottom of the ladder will be 5 feet from the house. How for up the side of the house will the ladder reach?
In the following exercises, solve by using the Quadratic Formula.
It takes two hours for two machines to manufacture 10,000 parts. If Machine #1 can do the job alone in one hour less than Machine #2 can do the job, how long does it take for each machine to manufacture 10,000 parts alone?
Use the Discriminant to Predict the Number of Solutions of a Quadratic Equation.
In the following exercises, determine the number of solutions for each quadratic equation.
(a)
(b) localid="1645008653364"
(c)localid="1644933436194"
A bullet is fired straight up from a BB gun with initial velocity 1120 feet per second at an initial height of 8 feet. Use the formula to determine how many seconds it will take for the bullet to hit the ground. (That is, when will h = 0?)
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