many problems i need answered

hello guys, I need some help on these problems. I am going to number them and then if you guys know the answer then please put the number of the question, the work u did and the answer. I have all the answers but i want them to be checked, because i cant get them checked for a while.

THIS- ^ MEANS IM GONNA MAKE A POWER SO x^3 MEANS "X TO THE THIRD POWER"


3. x^2-8x+2=0 (x^2 is x to the second power)

4. GRAPH y=2x-5

5. GRAPH -5<x (im guessing this is on a line at the 5, with an open circle, wih an arrow going to the right, am i right?)

6. write .0000644 in scientific notation

10. If y varies inversely as x and x=3 when y=7, find the equation relating x and y (im guessing this is x+4=7, im not sure though)

11. write the equation of a line parallel to y=2/3x-6

13. solve the system of equations: 2x-37=13
5x+3y=1
14. write 4.74 X 10^5 (10^5 means 10 to the 5th power)

15. FACTOR x^2-11x+28 (x^2 means x to the second power)

16. what is the intersection of the lines x=5 and y= -2

20. Rewrite in standard form: y=(-2/3)x=5

21. graph the function: f(x)= x^2+5x+6 (x^2 is x to the second power)

22. what are the zero's of the function in number 21?

24. solve for x: 5/9=3x/16 (these are fractions not division)

25. parallel lines have _______ y interecepts.

26.intersecting lines have ______ slopes.

29. Factor: x^2=4x+3 (x^2 is x to the second power)

30. Simplify: 2x(3x+6)+ 6x(x-1)

31. solve the system of equations: x-y=13
x+y=8

32. GRAPH -x^2-4x=4

33. solve the equation in number 32

34. write in DECIMAL notation: 1.03 X 10^-5 (10^-5 means 10 to the negative 5th power)

36. simplify: (3x)^-2
______
x^4

37. if y varies DIRECTLY as x and x=3 when y=7, find the equation relating x and y.

38. factor: x^2+8x-33


45. Is this graph a function?
|
____|_______
<_____ |_______>
|
|
|

(the bold line is the line, the otehr two lines, the dotted and the one with the little arrows are the graph.


adding more later


and just an overall question, when u have a problem like this-

(x+81)^2 (the ^2 is 2, the exponent), does that come out x^2=81 or X^3=81?? thanks, u just dont know if u add or multiply on those and all those rules with exponents nad parenthateses.


48. Write two examples of a 3rd degree binomial

answer to #1

3(x-2) = x+3
3x-6=x + 3
+6 = +6
3x= x + 9
-x = -x
2x/2 = 9/2
x= 4 1/2 or 4.5

Does this help???? :roll:

yes. thankyou, any more?

ZZZZZXXXXX said:

6. write .0000644 in scientific notation

Click to expand...

6.44 * 10^-5

You know, we're really not in the habit of doing a semester's worth of home work for folks. You'll have to show us a couple so we can see why you are compelled to submit so many problems.

wow thats alot.