ANSWER TO QUESTION 1

We multiply through by the Least Common Multiple which is 2.


We expand brackets to obtain,

Grouping like terms, have


Whenever you solve an equation and you get the above result, you don't have to get confuse.
It simply means the question does not have a UNIQUE solution.
That any real number will number will satisfy the above equation.
Hence,

ANSWER TO QUESTION 2

We factor x to obtain;

We divide both sides by (a+b)
Answer:

Step-by-step explanation:
The directrix y=-6 is parallel to the x axes, so parabola has equation of the form

where
is the vertex of parabola and p is parabola's parameter.
By the definition,
is the distance from the vertex to the directrix, so

Hence, the equation of parabola is

See attached diagram for the graph of parabola and its directrix.
In vertex form this equation is

Step-by-step explanation:
So first off we want to find out how many miles Nina can ride in 3,600
For this we have to convert 63,360 feet into miles
If there are 5,280 feet in one mile than we need to see how many times 5,280 goes in to 63,360
divide 63,360 by 5,280: you get 12
This means that she can bike 12 miles in 3,600 seconds
3,600 seconds is the same as an hour
Answer:
Nina can bike 12 miles per hour
We can simplify the expression with patience and a little mathematical tinkering.
The simplified expression is shown in the attached picture, along with more information obtained about your expression.
The objective is to add similar terms and fractions and group them together to form a solution in a compact, elegant form.