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snow_tiger [21]

4 years ago

7

Mary Lou baker rides a bicycle and travels at twice the speed of Wayne who is roller skates Mary and Wayne begin the race at the

same time and after 3 hours Mary is 18 miles ahead of Wayne what is Wayne's speed ?

1 answer:

san4es73 [151]4 years ago

4 0

$M=2W \\ \\ \frac{18}{3}=\\6\\W+6=M\\W=6\\M=12$

6 miles per hour.

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antoniya [11.8K]

Answer:

$N(T(t)) = 1408t^2 - 385.6t - 105.52$

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Step-by-step explanation:

To find the composite function N(T(t)), we just need to use the value of T(t) for each T in the function N(T). So we have that:

$N(T(t)) = 22 * (8t + 1.7)^2 - 123 * (8t + 1.7) + 40$

$N(T(t)) = 22 * (64t^2 + 27.2t + 2.89) - 984t - 209.1 + 40$

$N(T(t)) = 1408t^2 + 598.4t + 63.58 - 984t - 169.1$

$N(T(t)) = 1408t^2 - 385.6t - 105.52$

Now, to find the time when the bacteria count reaches 8019, we just need to use N(T(t)) = 8019 and then find the value of t:

$8019 = 1408t^2 - 385.6t - 105.52$

$1408t^2 - 385.6t - 8124.52 = 0$

Solving this quadratic equation, we have that t = 2.543 hours, so that is the time needed to the bacteria count reaching 8019.

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4 years ago

5 times p squared times q+ 10q

Basile [38]

Answer:

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Step-by-step explanation:

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777dan777 [17]

Answer:

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35, 33, 15, 32, 2, 28, 42

2, 15, 28, 32, 33, 35, 42

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4 years ago

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