$565+$65= 630
630/30 would be 21
it would take him 21 weeks to pay off his sister and buy the bike
Sixty-three, 60 + 3, 9 x 7, 63
Explanation:
Conversion of a quadratic equation from standard form to vertex form is done by completing the square method.
Assume the quadratic equation to be
where x is the variable.
Completing the square method is as follows:
- send the constant term to other side of equal

- divide the whole equation be coefficient of
, this will give 
- add
to both side of equality 
- Make one fraction on the right side and compress the expression on the left side

- rearrange the terms will give the vertex form of standard quadratic equation

Follow the above procedure will give the vertex form.
(NOTE : you must know that
. Use this equation in transforming the equation from step 3 to step 4)
Do 18x18 which equals 324
Answer:
1/2 ^w : decay factor after w weeks
hope this helps
Step-by-step explanation: