In the image, two circles are centered at A. The circle containing was dilated to produce the circle containing 8: What is the scale factor of the dilation?

OA 1 1
OB 2
OC 0.5
OD -0.5

What is the length of bc ? enter your answer in the box.bc =

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle