10% of is 7
25% of is 6

First one is 70

Second one is 24

Step-by-step explanation:

First one :7*100=700

700÷10=70

The second one :6*100=600

600÷25=24

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.