Solving Quadratic Equations By Using The Quadratic Formula Worksheet With Answers Page 16
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419-5 Solving Quadratic Equations by Using the Quadratic Formula
The solutions are –3.7 and 1.1.
2
27. 2x
= 12x − 18
SOLUTION:
Write the equation in standard form.
For this equation, a = 2, b = –12, and c = 18.
The solution is 3.
28. AMUSEMENT PARKS The Demon Drop at Cedar Point in Ohio takes riders to the top of a tower and drops
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them 60 feet. A function that approximates this ride is h = −16t
+ 64t − 60, where h is the height in feet and t is the
time in seconds. About how many seconds does it take for riders to drop 60 feet?
SOLUTION:
2
−16t
+ 64t − 60 = 0
For this equation, a = –16, b = 64, and c = –60.
It takes 2.5 seconds for the riders to drop from 60 feet to 0 feet.
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Page 16
Solve each equation. State which method you used.
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29. 2x
− 8x = 12
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