Please find perimeter and cost ​

What is the missing constant term in the perfect square that starts with x^2 -20x

For the equations below which statement is true ? -2x=14 6x=-42

Choose the equation that represents the graph below: (1 point) graph of a line passing through points negative 3 comma 0 and 0 comma 3 y = x − 3 y = −x + 3 y = −x − 3 y = x + 3 will award !