
Now completing the square.

(x+5)² = 16 is the rewritten equation... For first question btw.
For the solutions to the equation -

x = -1,-9 is the solution, for the second question.
1 of out 3? 1/3 if there is only three cards
Answer:
5/7 mile per hour.
Step-by-step explanation:
Divide 2/7 by 2/5 to get to 0.714. After that, convert the decimal to a fraction and you get your answer.
Hope this helped!!! <3 :)