Mathhhhh plzz HELP NOW !!!?

Question

Determine whether each point lies on the graph of the equation.

Equations: Points:

y= square root of x+4 a. (0,2) b. (5,3)

y= x^2-3x+2 a. (2,0) b. (-2,8)

y=4-|x-2| a.(1,5) b.(6,0)

y=1/3x^3-2x^2 a. (2-16/3) b.(-3,9)

How do i solve this?????????

PLEASE help me!!!

and show ur work and explain it !!!

Answer 1

put the numbers in for your X and Y values, they should equal eachother, for example, 1 a) 2=Square root of (0+4) ----- so, 2 = 2  so yes, it is a point on the graph.

If you want a quicker way, get a graphing calculator, and input the information for y equals, then graph it, and look to see if the line goes throught the points.

1 a) works, 1 b) works to.

2 a) works, 2 b) does not work.

3 a) does not work, 3 b)  works

4 a) works, 3 b) does not work

Answer 2

this is very simple math i love math so ill help you.your life will be easier if you buy a programming calculator i recommend ti 84 plus silver edition.

y= square root of x+4  a is true and so is b

y= x^2-3x+2               a is true but b isn't

y=4-|x-2| (absolute heh ez)   a false b true

y=1/3x^3-2x^2              a is true b is false

YOU NEED A TI 84 PRGM CALC!

Answer 3

The point (x, y) has the first value is x and second value is y

For example (0, 2) means x = 0, y = 2

1.  y = square root (x + 4)

Replace with x = 0 to check if y = 2 or not?

y = square root (0 + 4) = 2.  So the point (0, 2) IS on the graph

Replace x = 5 to check if y = 3 or not?

y = square root (5 + 4) = square root (9) = 3 --> Yes

Do the same thing for the rest

2. y= x^2-3x+2

a. (2,0) Yes      b. (-2,8) No

3.  y=4-|x-2|

a.(1,5)    No      b.(6,0) Yes

4.  y=1/3x^3-2x^2

a. (2-16/3)  Yes    b.(-3,9)  No

Answer 4

i'm not gonna give you the answers but i wil tell you how to work them

each thing like this: (2,3) is called a coordinate

(x,y)

so with each problem you sub in the numbers for x and y

1a) 2=√0+4

     2=√4

     2=2

     if the problem works out and the 2 sides are equal then yes, the points lie on the graph of the equation

1b)3=√5+4

    3=√9

    3=3

   answer is yes again

hope this helps:-)

Answer 5

The easiest way to do this is to take the points that you have (in the first problem, answer a use (0,2)) and put them into the equation.  So 2=square root of 0+4.  Is his true?  0 + 4 is 4.  The square root of 4 is 2.  So the answer checks out.  Do the same with all of your other problems.  If your solutions, a or b, don't work, check your work.