Which of the following questions describes the equation = a/4 -20?

what number, when multiplied by four, is equal to negative twenty?
what number, when divided by negative four, is equal to twenty?
what number, when multiplied by negative twenty, is equal to four?
what number, when divided by four, is equal to negative twenty?

Find the vertex of the function given below y=x^2-6x+1

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?