Since each side of a sqare is equal and there are four sides to the square

X being the side length.
Then you would simiply divide by 4 to isolate x

A side length is 56
Answer:

Step-by-step explanation:

After removing one black marble:

Solution= x=5
Alernative form= 21 x - 105= 0<span />
Answer:

Step-by-step explanation:
We are asked to find the tangent line approximation for
near
.
We will use linear approximation formula for a tangent line
of a function
at
to solve our given problem.

Let us find value of function at
as:

Now, we will find derivative of given function as:




Let us find derivative at 

Upon substituting our given values in linear approximation formula, we will get:


Therefore, our required tangent line for approximation would be
.