Question

4u - (3u)

Answer 1

if you have 4 sweets, and take away 3 sweets..how many sweets do you have left?
here 'u' are the sweets

Answer 2

u

Answer 3

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Answer 4

U

Answer 5

yes, that is correct.

Answer 6

What is f + 2e - (-3f)

Answer 7

well two negatives make a positive so in essence you have
f+2e+3f
so group the f's together
so
f+3f+2e=(1+3)f+2e = ?f+2e ?
how many f's do you have?

Answer 8

4 ?

Answer 9

Is 4e + 2e the answer ?

Answer 10

4 is correct but it would be 4f+2e

Answer 11

What is ; (a) × (-2a)

Answer 12

what is a * a?

Answer 13

A ?

Answer 14

what is 2x2?

Answer 15

4

Answer 16

yes, so 2*2=2^2=4
ie it equals two squared
so 3*3 is 3 squared
4*4 is four squared
so a*a is .....?

Answer 17

A squared

Answer 18

yes, but note it is a little 'a' not a big 'A' - you can't change the notation
so
a*-2a = -2*a*a = ?

Answer 19

I don't know that answer

Answer 20

okay, so you just told me that a*a was 'a squared' right?
so if you have -2 * 'a squared'
the answer is just \[-2a ^{2}\]

Answer 21

Ohh okay , so the answer for my question is -2a squared

Answer 22

?

Answer 23

yes that's correct

Answer 24

Your really smart :)

Answer 25

i'm not at all, but thankyou

Answer 26

What is ; b(b + c) -2 (b - c)

Answer 27

?

Answer 28

so if you expand your brackets you will get
(b*b)+(b*c)-(2*b)+(2*c)
what does that give you?

Answer 29

I don't know that one

Answer 30

I think .. I don't know :(

Answer 31

well at least try...come on. I can't give you the answers, but I can help you if you try.

Answer 32

4b - 2c ?

Answer 33

okay, you kind of have the right idea,
when i said to you before, what is a*a, what did you say?

Answer 34

a squared

Answer 35

right,
so what is b*b?

Answer 36

b squared

Answer 37

Yes! So that is the first bracket sorted!
so we have (b*b)+(b*c)-(2*b)+(2*c)
so this now equals \[b ^{2}+ (b \times c)-(2 \times b)+(2 \times c)\]

so if you have 2 x c, that just equals 2c right?

Answer 38

Correct

Answer 39

okay so if you have
2 x c=2c
3 x c=3c
then b x c = ??

Answer 40

bc

Answer 41

right!
so look at this formula again:
(b x b)+(b x c)-(2 x b)+(2 x c)
what do you have?

Answer 42

b squared + bc - 2b + 2c

Answer 43

that's it! that's your answer

Answer 44

2x + 5 = 10 , that one is easy

Answer 45

so what do you get for x?

Answer 46

I don't know, show me how to do the working

Answer 47

okay so you need to rearrange:
ax+b=c
ax=c-b
x=(c-b)/a

Answer 48

i'm going now, as i have my own studying to do
good luck

Answer 49

Thank you

Answer 50

So x = 5/2