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Thursday, 24 February 2011
Ask Questions on Algebra
Ask any questions you may have on algebra Please post your questions and I'll reply asap.
You have to raise everything in the bracket to the power of 4. So 3^4= 81, then x^4 and for (y^2)^4 - this means y^2 x y^2 x y^2 x y^2 which makes y^8. So if you put this together yu get 81x^4y^8. Hope this helps.
Andrew buys a bicycle. He pays a deposit of £d and then 12 equal monthly payments of £m. What is the expression for the cost of the bicycle? if his mum gives him £10 towards it how much will he pay? Help appreciated
To make y the subject in the equation 2y-x=6. First you add x to both sides. This gives: 2y = 6 + x Then you divide both sides by 2. This gives: y= (6 + x)/2.
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simplify (3xy^2)^4
ReplyDelete^=to the power of!!
the answer is 81x^4y^8 but i dont know how the textbook got it!
thanks!
You have to raise everything in the bracket to the power of 4.
ReplyDeleteSo 3^4= 81, then x^4
and for (y^2)^4 - this means
y^2 x y^2 x y^2 x y^2 which makes y^8.
So if you put this together yu get 81x^4y^8.
Hope this helps.
thanks that did help :)
ReplyDeletesimplify 2x^2-x(1+x)
the answer is x^2-x
i dont understand how this is the answer?
Andrew buys a bicycle. He pays a deposit of £d and then 12 equal monthly payments of £m.
ReplyDeleteWhat is the expression for the cost of the bicycle?
if his mum gives him £10 towards it how much will he pay? Help appreciated
2x^2 - x(1 + x)
ReplyDeleteFirst expand the bracket. That gives -x -x^2.
Therefore by collecting the like terms, in this case the x^2:
2x^2 - x -x^2 will be x^2 - x.
Deposit of £d is constant.
ReplyDelete12 monthly payments of £m will be 12 x m which gives £12m.
Expression for cost of bicycle will therefore be
£d + 12m
If he mums gibes him £10 towards it them he pays £10 less. So this will be
£d + 12m - 10
hey, can you please rearrange the equation 2y-x=6 to make y the subject!
ReplyDeletePlease help? I need to know :(
To make y the subject in the equation 2y-x=6.
ReplyDeleteFirst you add x to both sides. This gives:
2y = 6 + x
Then you divide both sides by 2. This gives:
y= (6 + x)/2.
Thanks