Question

@sammixboo Help Please!

Answer 1

There we go. OS stopped loading for me

Answer 2

Tag me when you finish :)

Answer 3

Daniel took two quizzes. On the first he earned 9.5 points per question plus two bonus points. On the second he earned 11.5 points per question plus 1 bonus point the expression for the average number of points Daniel earned is

\[(9 \times 5q +2) + (1+11.5q)\]
-----------------------------
\[ 2\],

where \[q\] represents the number of questions per quiz.




What is Daniel's average number of points if \[q = 8\]?

Answer 4

Once we figure out the equation numerator (the equation on the top of the division line), and the equation denominator, (the equation on the bottom of the division line), we have to divide what we get, because the answer will NOT be in fraction form.

Answer 5

If q = 8 then plug in 8 wherever q is.

\(\color{red}{\dfrac{(9\times5\times8+2)+(1+11.5\times8)}{2}}\)

Can you give this problem a try :) Tell me what you get!

Answer 6

Ok, sorry. Was in the middle of helping a user while you were posting that. Are you still working or do you want me to help?

Answer 7

still working.

Answer 8

Okie dokie. Tell me if you need any help :)

Answer 9

Using the trick you taught me, I remember that multiplication and division have to be on the left side, or subraction and addition overrule them.

Answer 10

Yes. do the multiplication/division first, then the addition/subtraction

Answer 11

Is it 462?

Answer 12

@sammixboo

Answer 13

Not quite. Let's solve the numerator. Solving the first parenthesis, what is 9*5*8?

Answer 14

360

Answer 15

@sammixboo

Answer 16

Right! So now we have

\(\color{red}{\dfrac{(360+2)+(1+11.5\times8)}{2}}\)

And we know that 360 + 2 = 362, so

\(\color{red}{\dfrac{362+(1+11.5\times8)}{2}}\)

Now lets solve the other parenthesis. What is 11.5*8?

Answer 17

Wait.

Answer 18

What about that trick you said.

Answer 19

You said that multiplication MUST be on the left side or else it doesn't get solved first.

Answer 20

You do what's in the parenthesis first, always. In the parenthesis, you always follow PEMDAS

Answer 21

Yes I know that.

Answer 22

After you solve everything in the parenthesis, you continue, still following pemdas

Answer 23

Oh, the multiplication/division always gets solved first

Answer 24

isn't the trick you showed me part of pemdas?

Answer 25

What!

Answer 26

Well, multiplication/division gets solve always before addition/subtraction**

Answer 27

But, you said it had to be on the left side or, no dice.

Answer 28

Unless being inside parenthesis changes that rule.

Answer 29

NO matter where the placement is in the parenthesis or not in parenthesis. You have to solve the multiplication/division starting from the left side, like a book, but you do have to skip all the addition/subtraction until you finish the multiplication/division

Answer 30

Then...did I get an answer wrong?

Answer 31

Math is confusing.

Answer 32

I usuallly can't hear things, not being able to read, now that's something.

Answer 33

Why do they even force us to do this anyway.

Answer 34

Since WHEN do variables and PEMDAS help us.

Answer 35

Hehe I feel the same, but take a look at what my friend made a little while ago about PEMDAS http://openstudy.com/study#/updates/545826d0e4b04ccc259160ab

Answer 36

I'm just gonna hope that I didn't get an answer wrong.

Answer 37

And let's move on.

Answer 38

Ok, so far we are right. We are at

\(\color{red}{\dfrac{(360+2)+(1+11.5\times8)}{2}}\)

And we know that 360 + 2 = 362, so

\(\color{red}{\dfrac{362+(1+11.5\times8)}{2}}\)

Now lets solve the other parenthesis. What is 11.5*8?

Answer 39

88.4?

Answer 40

I broke it up, it's probably wrong.

Answer 41

11.5*8 = 92 :P So now we have

\(\color{red}{\dfrac{362+(1+92)}{2}}\)

We know that 1 + 92 = 93, so now we have

\(\color{red}{\dfrac{362+93}{2}}\)

To finish this up, add 362 + 93 then divide the sum of that by 2

Answer 42

So what is 362 + 93?

Answer 43

455.

Answer 44

Right! Now what is 455/2?

Answer 45

227.5

Answer 46

Right, and that's your answer

Answer 47

OH COME ON! IT WON'T FIT!

Answer 48

Huh? xD

Answer 49

I'm typing it in, it won't fit!

Answer 50

It's not allowing me!

Answer 51

So it must not be it..

Answer 52

...

Answer 53

227.5 is what I get when I type the original question in the calculator

Answer 54

Wait....calculators don't use PEMDAS...

Answer 55

@sammixboo

Answer 56

Just typing this into the calculator. ((9*5*8+2)+(1+11.5*8))/2 Which is the same as

\(\color{red}{\dfrac{(9\times5\times8+2)+(1+11.5\times8)}{2}}\)

Answer 57

But they don't follow the rules of PEMDAS. I learned that by my "experiences".

Answer 58

It also could be the quiz being the sassy sue it is.

Answer 59

it says average..

Answer 60

Rounding strangely comes to..wait...

Answer 61

Nope. Don't know.

Answer 62

if ya round 227.5 it can round to 228

Answer 63

I dunno, it says average but..

Answer 64

ya know what you did wrong

Answer 65

No.

Answer 66

you put 9 times 5 when it says 9.5 in the word problem

Answer 67

i believe you typed equation wrong

Answer 68

How did you know that...

Answer 69

cause in the word problem and very lucky guess

Answer 70

Well..crap.

Answer 71

So...85.5?

Answer 72

That was a waste of time.

Answer 73

I'm sorry.

Answer 74

@sammixboo

Answer 75

Woot!