ページ1:

Pro Tips
3.
Function f is a quadratic function
where f(-20) = O and f(-4) = 0. The
graph of y = f(z) in the xy-plane has
a vertex at (r, -64). What is the value
of r?
Re:math by P'Richie
line: @re.math

ページ2:

Pro Tips
1.
The positive number a is 2,352% of
the sum of the positive numbers b
and c, and b is 84% of c. What
percent of b is a?
Re:math by P'Richie
line: @re.math