4
None because without an equality sign the given terms can't be considered to be an equation
is a quadratic equation for y, in terms of x.
No unfortunately this is not an equation. An equation must end with an equals sign. 5b + 14 is simply two terms.
Without an equality sign the given terms can't be considered to be an equation.
Without an equality sign the given terms can't be considered to be an equation and so therefore no solutions are possible.
That looks like a linear equation (no quadratic or higher terms), so you can expect it to have a single solution. However, actually solving the equation is not difficult; do it, to confirm this.
Without an equality sign the given terms can't be considered to be the equation of a circle.
Without an equality sign the given terms of an expression can't be classed as an equation and so therefore no solution is possible.
Without an equality sign the given terms can't be considered to be a straight line equation.
Only equations usually have solutions and the given terms without an equality sign can't be classed as an equation.
Without an equality sign the given terms are an expression and not an equation
for something to be an equation it has to be equal to something.2x+3=0 would be a linear equation (with x=-1.5) 2x+3+0 is just a series of terms.