Maths year 11

Original post by z_o_e

Can you give one more example similar to this just different numbers please.

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I'll post some more, but finish the question first. You've done the hard part. :smile:

Reply 1461

Original post by RDKGames

I'll post some more, but finish the question first. You've done the hard part. :smile:

Is that the percentage one?

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Reply 1462

Original post by z_o_e

Is that the percentage one?

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Yeah move onto part b with the percentages.

Reply 1463

Original post by RDKGames

Yeah move onto part b with the percentages.

How would I do that ;/

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Reply 1464

starstudent7

Original post by Lucky10

Best advice i could give DO PAST PAPERS its the best way to get better a maths. Any topics you dont get use sites like mathswatch.

I agree with this :smile:

.As this is what I did and I went from a C in year 10 to an A* in year 11 :h:

. Mathswatch is a godsend from heaven and I owe my A* to it :smile:

Reply 1465

Original post by z_o_e

How would I do that ;/

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Well look at what part b is asking for. You first need to find the area of the triangle before applying a certain percentage.

Reply 1466

Original post by RDKGames

Well look at what part b is asking for. You first need to find the area of the triangle before applying a certain percentage.

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Reply 1467

Original post by z_o_e

No calculator please.

Reply 1468

Original post by RDKGames

No calculator please.

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Reply 1469

Original post by z_o_e

Second line doesn't make sense. Try again. Expand the brackets.

Reply 1470

Original post by RDKGames

Second line doesn't make sense. Try again. Expand the brackets.

As in this way or do you mean

2 root 5 minus 18 root 5?

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Reply 1471

Original post by z_o_e

As in this way or do you mean

2 root 5 minus 18 root 5?

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Nope. Don't tell you forgot how to expand brackets with surds...

Reply 1472

Original post by RDKGames

Nope. Don't tell you forgot how to expand brackets with surds...

Nooo I remember I was just unsure!

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Reply 1473

Original post by RDKGames

Nope. Don't tell you forgot how to expand brackets with surds...

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Reply 1474

Original post by z_o_e

Yep. Collect the terms now.

Reply 1475

Original post by RDKGames

Yep. Collect the terms now.

I know it's a bit dodgy the second ones

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Reply 1476

Original post by RDKGames

Yep. Collect the terms now.

8+ 11-2 root 5?

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Reply 1477

K-Man_PhysCheM

Original post by z_o_e

The

2 - 2 \sqrt5

is not correct, because

2 \times -2\sqrt5 = -4\sqrt5

, not

2 - 2\sqrt5

(2 + \sqrt5)(9-2\sqrt5) = (2\times9)+(2\times-2\sqrt5)+(9\times\sqrt5)+(\sqrt5\times-2\sqrt5) = 18 -4\sqrt5 + 9\sqrt5 - 10

Now you need to collect like terms.

Reply 1478

Original post by K-Man_PhysCheM

The

2 - 2 \sqrt5

is not correct, because

2 \times -2\sqrt5 = -4\sqrt5

, not

2 - 2\sqrt5

(2 + \sqrt5)(9-2\sqrt5) = (2\times9)+(2\times-2\sqrt5)+(9\times\sqrt5)+(\sqrt5\times-2\sqrt5) = 18 -4\sqrt5 + 9\sqrt5 - 10

Now you need to collect like terms.

Do I not multiply them?

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Reply 1479