Answer:
(-5,9+√8)
Step-by-step explanation:
There are two ways in which you can find a point that lies in the circle. One of them is to do y the subject of the formula, and another one is to determine the center of the circumference, and with the information of the radius, you can sum this value upward or downward.
the general equation of a circle is:

with center at (h,k)
you have the following equation:

Then, the center is (-5,9)
if you sum the value of the radius in one of the fourth directions (up, down, left, right), for example upward you have

Then, one point that lies in the circle is (-5,9+√8)
Answer:
17) x=7
18) x= -26
19) x= -8
20) x= 6
Step-by-step explanation:
17) is congruent
18) is supplementary
19) is congruent
20) is congruent
The pyramid formula:

The volume in this case would be:
1/3×7.9×4
=79/30×4
=10.5333...
≈10.5 m^3
I think 88/9 is a fraction if you looking for a mixed number it will be 9 7/9.