Let's say the speed of the plane is "p", and the speed of the wind is "w".

when the plane goes with the wind, is not really going "p" mph fast, is really going "p + w" mph fast, because the wind is adding speed to it.

likewise when the plane is going against the wind, is also not going "p" fast is going "p - w" mph fast. Therefore,

$\bf \begin{cases}
p+w=460\implies \boxed{w}=460-p \\
p-w=400\\
----------\\
p-\left( \boxed{460 - p} \right)=400
\end{cases}
\\\\\\
2p-460=400\implies 2p=860\implies p=\cfrac{860}{2}\implies p=430$

7 0

3 years ago

What is the distribution law and simplify

Karo-lina-s [1.5K]

The Distributive Law says that multiplying a number by a group of numbers added together is the same as doing each multiplication separately. Example: 3 × (2 + 4) = 3×2 + 3×4. So the "3" can be "distributed" across the "2+4" into 3 times 2 and 3 times 4.

3 0

3 years ago

Find the missing length indicated.<br> Help pls

Grace [21]

2. none of the answers are correct

8 0

3 years ago

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