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likoan [24]
3 years ago
15

You enter an elevator and go down 5 floors. You exit on the 8th floor. Write an equation you can use to find the floor where you

entered the elevator. Let x be the floor where you entered the elevator.
An equation is _____ = 8
Mathematics
1 answer:
AlladinOne [14]3 years ago
6 0

Answer: so you do 5+8, then get 13. 13-5=8

Step-by-step explanation:

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When solving a system of equations of A and B, we get no solution. When solving B and C, the solution is (0,3). When solving A a
Aliun [14]

Step-by-step explanation:

How do we set about finding the points in which two graphs y = f(x) and y = g(x) intersect?

We already know how to find where the graph of f(x) cuts the x−axis. That’s where y = 0. We calculate it by solving the equation  f(x) = 0 .

When the graphs of y = f(x) and  y = g(x)  intersect , both graphs have exactly the same x and y values. So we can find the point or points of intersection by solving the equation  f(x) = g(x). The solution of this equation will give us the x value(s) of the point(s) of intersection. We can then find the y value by putting the value for x that we have found into one of the original equations. That is by calculating either f(x) or g(x).

Example 1 

Calculate the point of intersection of the two lines f(x) = 2x − 1 and g(x) = x + 1.  First let’s look at a graph of the two functions. We can see the point of intersection is (2, 3).



We calculate the point of intersection by solving the equation f(x) = g(x). That is:

    2x − 1 = x + 1

    2x − x = 1 + 1

            x = 2

The y coordinate can now be found by calculating f(2):

    f(2) = 2×2 − 1 = 3

The point of intersection is (2, 3).

The example shows that we can find the point of intersection in two ways.

Either graphically, by drawing the two graphs in the same coordinate system, or algebraically by solving the equation such as the one in the above example.

Solving an equation graphically is easy with a graphical calculator or a computer program such as Excel.

Some equations cannot be solved algebraically but we can find solutions that are correct to as many significant figures as we want by using computers and calculators

4 0
2 years ago
Read 2 more answers
What's the greatest common factor of: 2*2*2*2*3*3*3*5*2*2*3*3*3*7
erastova [34]

the greater common factor is : a.2

5 0
3 years ago
Read 2 more answers
4/r ​ = 5/7 need help please
Annette [7]
The answer to the question is

5r= 28

r= 28/5
7 0
3 years ago
Describe a real world situation that can be modeled by the equation y=1/20x
MariettaO [177]

Your neighbor will let you take water from the well on his claim,
charging you $.05 a quart.

If 'x' is the number of quarts you take from his well on Tuesday, then
'y' is the amount of money you owe him before the sun goes down.

3 0
3 years ago
The vertex of this parabola is at (1, 3). Which of the following could be its equation?
White raven [17]
For
y=a(x-h)^2+k
vertex is (h,k)

it could be
y=a(x+1)^2-3
8 0
3 years ago
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