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icang [17]
2 years ago
12

If using the method of completing the square to solve the quadratic equation x^2-20x+24=0x

Mathematics
1 answer:
Citrus2011 [14]2 years ago
7 0

Answer: (-10)^2

Step-by-step explanation:

(b / 2)^2 = (-10)^2

Hope this helps! Please give brainliest!

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2 years ago
John drove to Daytona Beach, Florida, in hours. When he returned, there was less traffic, and the trip took only hours. If John
olga55 [171]

Question: John drove to a distant city in 5 hours.

When he returned, there was less traffic and the trip took only 3 hours.

If John averaged 26 mph faster on the return trip, how fast did he drive each way

Answer:

For the first trip he drove at a speed of 39 mph

For the second trip he drove at a speed of 65 mph

Step-by-step explanation:

Let the distance for both journey be Z because they are equal.

Let the speed for the first journey be X

Let the speed of the second journey be Y

Formula for speed = distance ÷ time

For the first journey the speed X = Z ÷ 5

For the second journey the speed Y = Z ÷ 3

Since John averaged 26 mph faster in the second trip than the first trip due to traffic, it means that the difference in speed between the first & second trip is 26 mph

Difference in speed = (Z÷3) - (Z÷5) = 26

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Upon cross multiplication

2Z = 390

Z = 390÷2 = 195 miles

Therefore speed for first journey = 195 ÷ 5 = 39 mph

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To verify, 65 - 39 = 26 mph

8 0
3 years ago
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