2x-2y
I couldn’t tell if the first figure was a one or a L or i so I solved it as a 1
Answer:
Procedure:
1) Form a system of 3 linear equations based on the two zeroes and a point.
2) Solve the resulting system by analytical methods.
3) Substitute all coefficients.
Step-by-step explanation:
A quadratic function is a polynomial of the form:
(1)
Where:
- Independent variable.
- Dependent variable.
,
,
- Coefficients.
A value of
is a zero of the quadratic function if and only if
. By Fundamental Theorem of Algebra, quadratic functions with real coefficients may have two real solutions. We know the following three points:
,
and 
Based on such information, we form the following system of linear equations:
(2)
(3)
(4)
There are several forms of solving the system of equations. We decide to solve for all coefficients by determinants:







And finally we obtain the equation of the quadratic function given two zeroes and a point.
Kilogram is an SI unit for mass.
Ounce and pound refer to American system for measuring things, and decakilogram is not the "basic" unit, but kilogram is.

By the chain rule,

We have

and we're given that
changes at a constant rate of
thousand people per minute, which means

At the moment
thousand people are in the park, we have
, so we find

or approximately 2.324 thousand people per minute.