Help me do some maths!

Knip, I know the answer to all of them and will gladly show you my working. Heck, i'll even add you on MSN and teach you. But before I do show you, I want to see you try them first. :)
 
3. Plot a point on your graph at, (x=1, y = 2), (x=2, y=5) and (x=3, y=8) and draw a line through them continuing to the edges of the graph, this shows your points.

as y=3x -1
then if x is 1,
3x = 3,
3 minus 1 = 2,
so y is 2.

5. y = mx + c
(0, 4) (2, 14)

As x is 0 in the first point, the 'mx' can be ignored. This means that c is 4.
In the second point, y = 14, and x = 2, so 14 minus 'c' (4) = 10. 10 divided by 2 = 5 ('m').
So y = 5x +4
 
1. Paul has 35 CD's, but 14 of them have damaged cases, what percentage of his CD's are damaged?
None, but if you meant cases: 14/35 = 0.4 = 40%

2. The diagonal of a square is 20 cm long, find the area of the square.
a^2+b^2=c^2
C=20
c^2=400
400/2=200=a^2=b^2
sqrt(200) = a = b
sqrt(200)^2=200

200cm^2

3. y = 3x-1
x=1 y=2
x=2 y=5
x=3 y=8

4. a. 4,9,16,25
(n+1)^2

b 3 1/4 3 1/2, 3 3/4
3+(n)/4

5. Gradient of a line = dy/dx

dif in y = 10
dig in x = 2

10/2 = 5 = gradient

gradient = m

y = 5x+c
sub in (2,14)
14=5*2+c
14-(5*2) = c
14-10=4
c=4
c=2
 
knip said:
Ok Help me OCUK!

I need to do some maths questions and was wondering if you lot can help me please! I need to show my working as well.

1. Paul has 35 CD's, but 14 of them have damaged cases, what percentage of his CD's are damaged?

2. The diagonal of a square is 20 cm long, find the area of the square.

3. What would be the co-ordinates for the graph y=3x -1

4. For each of these sequences find an expression for the nth term

4,9,16,25

3, 3 1/4 3 1/2, 3 3/4

5. A line with the equation y=mx + c goes through the points (0,4) and (2,14) find m and c.

Thankyou muchly!
Click to expand...

I didn't bother to read the whole thread, but I hope you are joking....that's basic....basic basic algebra
 
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