A good app that would help you with math is photomath
Answer:
The value of x component changes at a rate of
units per second
Step-by-step explanation:
We are given that 
Differentiating on both sides with respect to time we get

It is given that
Solving for
we get

Answer:
A
Step-by-step explanation:
f(x)=x^2-4x+3
x coordinate: -b/2a
-(-4)/2(1)=4/2=2
and to find the y coordinate just plug in the value of -b/2a for x and solve for y
If is -(-13/12) then A. -13/-12
If is -13/12 then B. 13/-12

A varible represents the number u are looking for.
Example:
2x + 3x