Answer:
45
Explanation:
X+30=3x and then u just solve the equation.
Railroads on the Railways required tracks for the trains to run on them these tracks earlier made up of iron for its heavy duty but soon enough realise that iron was not a very good option for tracks. Meaning drawbacks of using iron for example rusting is it was realised that Steel was a better option in making railroads.
Steel being made out of iron is heavy duty material yet it is not much prone to rusting. Just addition of certain minerals and carbon in iron steel forging is done making it heavy duty material.
<span>a group of words established by usage as having a meaning not deducible from those of the individual words</span>
They were the power above the king
Fireworks are made by first making the stars by mixing black powder with the chemicals needed to make a specific color and shape. (Ex. Copper makes blue) The explosion is made thanks to gunpowder. Fireworks were created sometime in 600-900 AD and legend has it that the first gunpowder was made by a Chinese alchemist and was poured into bamboo. We don’t really know where fireworks came from though. And I think they should be legal just have more regulations and the laws be consistent in every place cause I know in the US my state there isn’t really much regulation. There were someone setting them off by an elementary school in a neighborhood, and many people get very injured from fireworks especially on Independence Day here in the US since they aren’t always sober when setting off fireworks. I hope this helps!