The equation shows the relationship between x and y:

y = −2x + 11

what is the slope of the equation?

−11
−2
9
11

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?