bunyonb
37.5% of a number is 105. what is the number?
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mayankdevnani
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|dw:1355145221270:dw|
mayankdevnani
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can you now solve it? @bunyonb
bunyonb
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It never occured to me that that was the solution.
bunyonb
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There is an equation question that says: From the graph read off where − 3 + x^2 + 2 x = − 2 x − 3
mayankdevnani
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that was the solution , right
bunyonb
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yes
mayankdevnani
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and find the value of x, can you?
bunyonb
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may i upload the paper
to show you what i am talking about?
mayankdevnani
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plzz
bunyonb
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ok hold on
mayankdevnani
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k
bunyonb
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i upload
bunyonb
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Look at question 3 and 4
bunyonb
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at Question 3 (d)
mayankdevnani
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sorry!!!i haven't any knowledge about this!!! sorry!!! @bunyonb
bunyonb
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ok
thanks for your help
mayankdevnani
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a gr8 welcome
bunyonb
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cwrw
bunyonb
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@cwrw238 how about you?
mayankdevnani
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@cwrw238 plz help bunyonb!!!
cwrw238
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is it question 3 d you need help with?
bunyonb
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yes
bunyonb
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There is an equation question that says: From the graph read off where − 3 + x^2 + 2 x = − 2 x − 3
cwrw238
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have you drawn the graph of y = -3 + x^2 + 2x?
bunyonb
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yes
cwrw238
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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
bunyonb
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oh so i would need to plot two equations using some points
thats what you are saying?
bunyonb
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on the same graph
cwrw238
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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)
cwrw238
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yes on same graph
bunyonb
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ok
cwrw238
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you should get (-4,5) for one of the points - i'll let you find the second one.
bunyonb
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cool
bunyonb
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so you dont have to plot all the points?
cwrw238
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no 3 points is enough for y = -2x-3
bunyonb
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ok
bunyonb
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I just plot both equations
bunyonb
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its true that the line touches the curve at -4
bunyonb
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the line touches the curve starting at
( - 0.5,, -4)
bunyonb
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but my graph is kinda messy so it is hard to figure out the second one
bunyonb
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due to previous mistakes
bunyonb
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so the second point would be when it stops touching the curve?
bunyonb
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My graph is inaccurate
because the straight line is kinda off
bunyonb
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I scaled the y-axis as even numbers
bunyonb
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How did you get -4, 5 ?
bunyonb
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i got - 0.5, -4
bunyonb
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@cwrw238 you there?