Find (x.y). y=6x-11 and -2x-3y=-7
1 answer:
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Answer:
Step-by-step explanation:
⇒ 3x² + 5
Substitute x = 4 :
⇒ 3(4)² + 5
⇒ 3(16) + 5
⇒ 48 + 5
⇒ 53
Using the relation between velocity, distance and time, it is found that her jogging rate was of 6 mph.
<h3>What is the relation between velocity, distance and time?</h3>Velocity is <u>distance divided by time,</u> hence:
Jogging, her velocity was of v, while the time was of t, for a distance of 12 miles, hence:
Biking, her velocity was of v + 6, while the time was of 3 - t, for a distance of 12 miles, hence:
Then:
18t - 6t² = 24t - 36
6t² + 6t - 36 = 0
t² + t - 6 = 0
(t + 3)(t - 2) = 0. -> t = 2 hours.
Hence her jogging rate in mph is given as follows:
More can be learned about the relation between velocity, distance and time at brainly.com/question/24316569
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