Gcf of the numbers 30,48,60 (greatest common factor)

Which expression gives the area of the triangle shown below

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

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.