Answer:
9
Step-by-step explanation:
I could be wrong but I got 28. I devided 420 by 15
5 x 10 is 50 then 50 + 11 is 61 so I think it would be 61 ;)
9514 1404 393
Answer:
1 +i√3.5
Step-by-step explanation:
In vertex form, the equation is ...
2(x² -2x +1) +7 = 0
2(x -1)² +7 = 0
Then the solutions are ...
(x -1)² = -7/2
x = 1 ±i√3.5
One solution is 1+i√3.5.
