Question

Which literal equation is equivalent to y = 0.4x?



A. x = 0.4y




B. y = 0.4/x




C. 0.4 = xy




D. 0.4 = y/x

Answer 1

Now, I chose C.

Answer 2

Try it yourself. :P

Answer 3

I mean try it yourself first. :P

Answer 4

Because x times x = crossed out
And x times y = xy

Answer 5

While 0.4 becomes by itself.

Answer 6

Am I correct? ;)

Answer 7

Nope, sorry.

Answer 8

Nuuu

Answer 9

wanna try one more time?

Answer 10

You divide it?

Answer 11

Just tell me are you dividing by \(x\) or multiplying by \(x\). ?

Answer 12

Multiplying by x

Answer 13

Okay I show you when you will do that, what you would get. :P

Answer 14

Okay.

Answer 15

\[y \color{red}{\times x} = 0.4x \color{red}{\times x}\]

Answer 16

Yeye that's what I did :3

Answer 17

\[x \times x = ?\]

Answer 18

Can't find that cross symbol >.<

Answer 19

\[x \times x = x^2 \quad \qquad \quad x \times \frac{1}{x} = 1\]

Answer 20

oh..

Answer 21

To cross that, one \(x\) should be in multiplication and other in divide.

Answer 22

Ohhh.......... ,-,

Answer 23

So, best option is to divide by \(x\) and not multiply.

Answer 24

Which would be.. y/x?

Answer 25

\[\frac{y}{\color{green}{x}} = \frac{0.4x}{\color{green}{x}}\]

Answer 26

\[\frac{y}{\color{green}{x}} = \frac{0.4x}{\color{green}{x}} = \frac{y}{x} = \frac{0.4 \cancel{x}}{\cancel{x}} \implies \frac{y}{x} = 0.4\]

Answer 27

ohk

Answer 28

So, here only one option is correct, okay?

Answer 29

Yes, which is 0.4 = y/x

Answer 30

Do you know how we decide that we have to multiply here or divide here ??

Answer 31

yep

Answer 32

If you know then how come you multiplied by \(x\) and not divide? :P

Answer 33

heh.......

Answer 34

That was after you explained :3

Answer 35

Good.. :) Keep on practising these things, you will surely get one day. :)

Now which one day, I don't know, it depends on you. :P

Answer 36

mk..

Answer 37

\(\color{blue}{\dagger}\).

Answer 38

Lemme try answering this question..

Answer 39

this? you have answered it already. :P

Answer 40

Solve for m.

E = cm/r




A. m = E + r/c





B. m = Er/c




C. m = E - rc


m = E – rc


D.


m = E + rc

Answer 41

okais.. SOO..

;-;..

Answer 42

So ?

Answer 43

-.- I don't get this question....

Answer 44

Ha ha ha.. :) This is the same like previous. :P

Answer 45

I know, but.... It's like containing + and - and and... more more.. ;-;

Answer 46

B since it's containing division/

Answer 47

Why are you looking at your options?

Answer 48

Suppose you are not given with options. yes by options, you can clearly find what will be your answer, but don't go with options, solve it step by step.

Answer 49

B is surely your answer, as you said right.

Answer 50

E = cm/r

So the first step is... Getting m = [something] right?

Answer 51

Yep.

Answer 52

Cancel them one by one, let us cancel \(r\) first, okay?

Answer 53

to cross out \(r\) from right side, what will you go?

Answer 54

okay

Answer 55

*do?

Answer 56

e = cm

Answer 57

er*

Answer 58

Yeah it is right, but e should be \(E\), capital one.

Answer 59

Why does it make a dif? o_o

Answer 60

Now let us break the legs of c, because it is the option you chose for your previous question, and it made your answer incorrect. :P

Answer 61

How can you remove \(c\) from right side?

Answer 62

um..

Answer 63

Then do it.

Answer 64

c divided by cm?

Answer 65

yep..

Answer 66

which would be m and Er/c?

Answer 67

In \(cm\), \(c\) is in multiplication with \(m\) like this : \(c \times m\), as \(c\) is in multiplication, so you will divide it by \(c\), to cancel it.

Answer 68

ok

Answer 69

\[m = \frac{Er}{c}\]

Answer 70

How many left now?

Answer 71

For?

Answer 72

I mean how many more problem you are left with?

Answer 73

Nonee.. I did 2 problems by myself and got 100% :3

Answer 74

and 3 problems with your help. (which was towards the end)

Answer 75

So, anything more I can do it for you now?

Answer 76

nope.

Answer 77

Satisfied?