See the picture above for the solution.
For this case, the first thing you should keep in mind is the following conversion:
![1 hour = 3600 seconds](https://tex.z-dn.net/?f=1%20hour%20%3D%203600%20seconds)
Therefore, by applying the conversion to the given internet speed, we have:
![(2)\frac{Mb}{s} * (3600) \frac{s}{h} = 7200\frac{Mb}{h}](https://tex.z-dn.net/?f=%282%29%5Cfrac%7BMb%7D%7Bs%7D%20%2A%20%283600%29%20%5Cfrac%7Bs%7D%7Bh%7D%20%3D%207200%5Cfrac%7BMb%7D%7Bh%7D)
Answer:
The speed of the internet in megabytes per hour is:
![7200\frac{Mb}{h}](https://tex.z-dn.net/?f=7200%5Cfrac%7BMb%7D%7Bh%7D)
We need to apply distributive property on each of the given expressions to write their equivalent expressions.
(1) ![-3(2x-4)](https://tex.z-dn.net/?f=-3%282x-4%29)
Upon using distributive property, we get:
![(-3)(2x)+(-3)(-4)\\ -6x+12](https://tex.z-dn.net/?f=%28-3%29%282x%29%2B%28-3%29%28-4%29%5C%5C%0A-6x%2B12)
(2)
Upon using distributive property, we get:
![-9+5a](https://tex.z-dn.net/?f=-9%2B5a)
(3) ![-7(+50a)](https://tex.z-dn.net/?f=-7%28%2B50a%29)
This part is incomplete.
(4) ![\frac{4}{5}(10y+-x+-15)](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B5%7D%2810y%2B-x%2B-15%29)
Upon using distributive property, we get:
![\frac{4}{5}(10y)+\frac{4}{5}(-x)+\frac{4}{5}(-15)\\ 8y-\frac{4x}{5}-12](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B5%7D%2810y%29%2B%5Cfrac%7B4%7D%7B5%7D%28-x%29%2B%5Cfrac%7B4%7D%7B5%7D%28-15%29%5C%5C%0A8y-%5Cfrac%7B4x%7D%7B5%7D-12)
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Hope this helps!