Notifications
Clear all

Maths help

Page 1 / 2

Jadid
Posts: 24
Topic starter
(@jadid-2)
Eminent Member
Joined: 3 years ago
15864581628458674119148898116957

 

Topic Tags
29 Replies
Jadid
Posts: 24
Topic starter
(@jadid-2)
Eminent Member
Joined: 3 years ago
  • Why can't I do that
Reply

Jadid
Posts: 24
Topic starter
(@jadid-2)
Eminent Member
Joined: 3 years ago
  • why do I have to do this instead

    15864583524843683357001035365641

     

Reply
Jadid
Posts: 24
Topic starter
(@jadid-2)
Eminent Member
Joined: 3 years ago

Here is the question

15864584001053492471997319886542

 

Reply

Further_Maths_Student
Posts: 274
(@further_maths_student)
Reputable Member
Joined: 3 years ago

I think you've been doing to much maths...!

I can't speak too much though.. Being up at 4:40am and helping with maths xd

cancelling out like terms in fractions is a concept you have to be familiar with from gcse

If you have a/b = b/d

image
image

The only way to solve it is by bringing the denominators to the top

image

You can't just simply cancel them out. I think you're getting confused with this scenario

image

If the numerators were both the same, then you can cancel them. (since you can "divide both sides by a")

image
image

or if the denominators were both the same, you could "times both sides by a" and they would cancel out

Reply
Jadid
Posts: 24
Topic starter
(@jadid-2)
Eminent Member
Joined: 3 years ago

That didn't really answer the question tho,

Cos there the numerator on the RHS and the denominator on the LHS are the same so why does me cancelling them out give me a wrong answer 

Reply
Jadid
(@jadid-2)
Joined: 3 years ago

Eminent Member
Posts: 24

Never mind I didn't read your explanation properly.

Ty

Reply

Hassnain Ali Rashid
Posts: 76
(@hrashid_)
Trusted Member
Joined: 3 years ago

Someone help with part B please

image

 

Reply
Hassnain Ali Rashid
Posts: 76
(@hrashid_)
Trusted Member
Joined: 3 years ago
image
Reply
Zeeshan Ahmed
Admin
(@zeeshan)
Joined: 3 years ago

Prominent Member
Posts: 768

@hrashid_

for the first question 

70FD2A1C 48BB 440A 8595 C8FAA2E727B8

pretend you had this instead (very similar)

91926BFA 4F03 4108 9CB3 AE358DF17A20

they say OX = 3a +1/2b, but we’ve going to work out what it is for ourselves. We do this by going via OM + MX, where MX I called xa because I didn’t know how much of a it is.

DEAFB459 0EAD 468C A942 CE82FB58A5D8

so we just worked out what OX is ourselves, but they got that 3a + 1/2b. That means my 1/2b + xa is the same thing as 3a +1/2b - as they are both OX.

168BC031 7676 416C 85E1 257B14DA52F4

So we compare them and realise x must be -3... this means the original question is very easy as we now know how long MX is

Reply
Zeeshan Ahmed
Admin
(@zeeshan)
Joined: 3 years ago

Prominent Member
Posts: 768

For the second question, it’s a bit more difficult but same concept of finding two things the same then equalling them to each other (equalling the a’s and b’s)

2931C0D4 B2E4 4CE7 A968 395443B42531

this is what they give, and we should go through the question bit by bit. Work out AB and MN, then MP is just a multiple of MN as it’s on the same line so I call that multiple x

D5FF0835 D725 40CA 9E2B C5CAAF50C06D

Although it’s a multiple of MN, I can still work out what it actually is via MO +OA + AP

 

758323BF 646D 42B0 83B0 DDCFCF76CE89

 Then after some simplifying I end up with this

DC378896 0DE0 4E2B 8F5D 6F4476A59593

so now we’ve got 2 expressions for MP, and just like before what did we do when we have two expressions? We equalled the A’s then equalled the b’s (doesn’t matter if one of the routes looks messy and has letters)

93DFAF5D 5EB5 45EF AD2D B8D87A156D19

Now the light purple should be equal to the light purple bit and the dark purple should be equal to the dark purple bit

D3DD45CD 1E2F 4236 9895 29E21B3EE1F2

After  you equal them, you will have two equations with two unknowns which you now just do simultaneous equations with

Reply

Page 1 / 2

EXAM TOPICS TO COME UP – 2022 SUMMER EXAMS (GCSE and A-Level)

A levels GCSEs
As you know, the topics for GCSE and A-Level exams have been released today by all exam boards. Below are...
View Post

How To Choose The Right University For You?

How To Choose The Right University For You?
Education Studying University
Choosing the right university is one of the most important decisions you will make in your life. For most students,...
View Post

2022 Real Exams Cancelled Again?

2022 Real Exams Cancelled Again?
A levels Education GCSEs
Ofqual and the government have announced that they are in talks about the changes for the 2022 examinations (GCSE, AS-Level...
View Post

Should I do a Physics Degree?

Should I do a Physics Degree?
Degrees University
A physics degree will be a good choice for you if you enjoy studying A-Level Maths and Physics. The degree...
View Post

Book a free trial before purchasing, fill in the form below.