## bunyonb 2 years ago 37.5% of a number is 105. what is the number?

1. mayankdevnani

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2. mayankdevnani

can you now solve it? @bunyonb

3. bunyonb

It never occured to me that that was the solution.

4. bunyonb

There is an equation question that says: From the graph read off where − 3 + x^2 + 2 x = − 2 x − 3

5. mayankdevnani

that was the solution , right

6. bunyonb

yes

7. mayankdevnani

and find the value of x, can you?

8. bunyonb

may i upload the paper to show you what i am talking about?

9. mayankdevnani

plzz

10. bunyonb

ok hold on

11. mayankdevnani

k

12. bunyonb

13. bunyonb

Look at question 3 and 4

14. bunyonb

at Question 3 (d)

15. mayankdevnani

16. bunyonb

17. mayankdevnani

a gr8 welcome

18. bunyonb

cwrw

19. bunyonb

20. mayankdevnani

@cwrw238 plz help bunyonb!!!

21. cwrw238

is it question 3 d you need help with?

22. bunyonb

yes

23. bunyonb

There is an equation question that says: From the graph read off where − 3 + x^2 + 2 x = − 2 x − 3

24. cwrw238

have you drawn the graph of y = -3 + x^2 + 2x?

25. bunyonb

yes

26. cwrw238

ok its the shape of a U i expect now you need to draw the graph of y = -2x - 3 on the same graph paper. plotting 3 points will be ok i suggest you plot: x y 0 -3 -2 1 1 -5

27. bunyonb

oh so i would need to plot two equations using some points thats what you are saying?

28. bunyonb

on the same graph

29. cwrw238

now their graph wil1 be a straight line which will probably cut the curved graph at two points at these points the 2 expressions are equal and thats what you want - the coordinates of these 2 points (x,y)

30. cwrw238

yes on same graph

31. bunyonb

ok

32. cwrw238

you should get (-4,5) for one of the points - i'll let you find the second one.

33. bunyonb

cool

34. bunyonb

so you dont have to plot all the points?

35. cwrw238

no 3 points is enough for y = -2x-3

36. bunyonb

ok

37. bunyonb

I just plot both equations

38. bunyonb

its true that the line touches the curve at -4

39. bunyonb

the line touches the curve starting at ( - 0.5,, -4)

40. bunyonb

but my graph is kinda messy so it is hard to figure out the second one

41. bunyonb

due to previous mistakes

42. bunyonb

so the second point would be when it stops touching the curve?

43. bunyonb

My graph is inaccurate because the straight line is kinda off

44. bunyonb

I scaled the y-axis as even numbers

45. bunyonb

How did you get -4, 5 ?

46. bunyonb

i got - 0.5, -4

47. bunyonb

@cwrw238 you there?