X2 + y2 + 4x – 2y = < a
the equation of a circle in the xy-plane is shown
above. what is the radius of the circle?
a) 2
b) 3
c) 4
d) 9

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

If set d is not the empty set but is a subset of set e, then which of the following is true? d ∩ e = d d ∩ e = e d ∩ e = ∅

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.