15. 145. 360-90-95-30
16. 90
The other picture number 16 again I already did that one.
Answer:
126
Step-by-step explanation:
Row 1: 30+0*4
Row 2: 30+1*4
Row 3: 30+2*4
...
The list goes on. Do you see a pattern here? If we call the row number as r, the formula is 30+(r-1)*4. In the 25th row, the r is 25. So in the formula, it is 30+(25-1)*4=30+24*4=126.
I hope that helped.
Answer:
6 + 2g
Step-by-step explanation:
whenever you have a problem like that you have to distribute the 2 to both the numbers in the parenthesis. You have to multiply 2 by 3 which is 6. Then you multiply 2 by g and you get 2g. We can't get any further so the simplified expression would be 6 + 2g
The vertex form:

(h,k) - the coordinates of the vertex

The coordinates of the vertex are
(-4,13).