Xdivided by 4 equals -7. what is x?

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi