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It depends on the equation. It could have one, it could have an infinite number.
Multiply the top equation by -3 and the bottom equation by 2.
If you have a quadratic equation and there is no x to put into the equation to get zero. The graph is like a U that is above the x axis or a cap that is below the x axis.
You can write an equivalent equation from a selected equation in the system of equations to isolate a variable. You can then take that variable and substitute it into the other equations. Then you will have a system of equations with one less equation and one less variable and it will be simpler to solve.
Go study
you didn't put any equations, but the answer probably begins with y= (x-4)^2+1
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I looked all over the internet and could not find a parametric equation for this shape. You can look at the link below to find the regular cartesian equation. If you are good at parametric equations you could probably convert this into parametric form. I am not so good at parametric equations.
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The correct set of coefficient for an equation depends with the equation in question. There are many types of equations.
The man equation should be an equation / a system of equations that could describe the man as a living / non living entity.
It depends on the equation. It could have one, it could have an infinite number.
Multiply the top equation by -3 and the bottom equation by 2.
It might have been possible to answer the question if you had bothered to include any equations below. But since you haven't there can be no answer.