How to find value of x with secant and tangent

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

How do i find the missing angle measure in a polygon

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.