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SVEN [57.7K]
2 years ago
14

Select the quadratic that has roots x=8 and x=-5 a x^2 + 3x -40

Mathematics
1 answer:
sergiy2304 [10]2 years ago
4 0
If x = 8, then the factor is (x - 8); likewise, if x = -5, then the factor is (x + 5).  FOIL those together and get B
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Write 0.55% as a decimal and as a mixed number or fraction in simplest form
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Lisa started to drive from Boston to Washington, DC, which is 440 miles away, at 8:00 AM. For the first four hours of her trip,
sukhopar [10]

Answer:

60 mph

Step-by-step explanation:

Given;

Total distance covered d = 440 miles

Average speed in the first 4 hours v1 = 50 mph

Total time taken for the whole trip t = 8:00 to 4:00pm

t = 16:00-8:00 = 8 hours

Firstly we need to calculate the distance covered during the first 4 hours;

d1 = average speed × time = v1 × t1

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Then we need to calculate the distance covered in the second period of the journey;

d = d1 + d2

d2 = d - d1

Substituting the values;

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The average speed during the second part of the trip is 60 mph

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2 years ago
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