Question

I need help with evaluating algibraic experssions(:

Answer 1

I can help :)

Answer 2

ok (: thanks the problem is 5/2n+3/3n n=6 (:

Answer 3

Okay. All you need to do is replace n with 6. So you get:
5/(2*6)+3/(3*6)
5/12+3/18
From here, get a common denominator, which is 36.
so (3/3)*(5/12)+(2/2)*(3/18)
This gives 15/36+6/36 or 21/36.
You can simplify that by dividing top and bottom by 3 giving: 7/12

Answer 4

Tell me if that doesn't make sense or if you have any other questions :)

Answer 5

sorry I had to get a pencil for notes(:

Answer 6

No problem :)

Answer 7

thank you though. (: it helped can you walk me though one? please

Answer 8

Of course

Answer 9

ok n/2 - 1?

Answer 10

if n=6?

Answer 11

yes sorry

Answer 12

No problem.
So start by substituting 6 in for n. This gives:
\[6/2-1\].
6 divided by 2 is 3.
\[3-1\]
And 3 minus one is 2.
\[2\]
So the expression equals two :)

Answer 13

oh wow thats easy (:

Answer 14

They all work similarly. But I can do more if you need me to. :)

Answer 15

ok what about 3 z/5 + 5/z z=10 (:

Answer 16

Okie dokie. Same as before, start by substituting 10 in for z. This gives:
\[(3*10)/5+5/10\]
Following the order of operations you do the multiplication first.
3 times 10 is 30.
\[30/5+5/10\]
From here get a common denominator. In this case it is 10.
\[(2/2)*(30/5)+5/10\]
\[60/10+5/10\]
Then add the numerators giving.
65/10.
You can divide by 5 to simplify it a little giving.
13/2. :)

Answer 17

Does that make sense?

Answer 18

You can make it a mixed number or a decimal. As a mixed number it would be 6 1/2. As a decimal that is 6.5.

Answer 19

I'm not sure which form you would want :P

Answer 20

haha ok that makes sence I have a big packet with allot of problems and they are all done I just dont have a way to corret them lol.

Answer 21

does that make sence? lol my teacher isnt in town I have it all done just no way to correct it and I want to pass (:

Answer 22

Yeah, well give them a try and if you get stuck just post here and I'll try to give you a heading :P

Answer 23

well I have them done I just need to have them corrected lol. (:

Answer 24

its a big packet (:

Answer 25

Julie has 15 new pencils. Eleven of them are priamry colors. what part of the total number of pencils are primary colors.? I got 11/15 (: is that correct

Answer 26

Yup :)

Answer 27

ok would you mind going through my packet with me.

Answer 28

I don't mind at all. But try them first :P

Answer 29

i have I have them all done I just need them corrected does that make sence?

Answer 30

Yeah, go for it :P

Answer 31

ok Ed took a servey of students in Mr. Edwars class. fifteen of a total of twenty one students have pets. what part of the total number of students have pets.? and it is 15/21 (: lol

Answer 32

Yup

Answer 33

ok 8/3 as a proper fraction = 2 2/3

Answer 34

Well, a proper fraction is one such that the numerator is smaller than the denominator. 2 2/3 is a mixed number but I believe that is right.

Answer 35

ok what about 33 1/2 =67/2 (:

Answer 36

Yup

Answer 37

3/5 - 7/45 (:

Answer 38

First, get a common denominator for 45. (9/9)*(3/5)-7/45. 27/45-7/45=20/45. You can then simplify it by dividing it by 5 giving. 4/9

Answer 39

whoo I got it (:

Answer 40

19/20-3/4

Answer 41

Same thing. Find a common denominator of 20. 19/20-(5/5)(3/4)=19/20-15/20=4/20. Dividing by 4 you get 1/5.

Answer 42

i got it i am just checking my answers in my packet lol (:

Answer 43

5/8+5/6

Answer 44

I would use 24 as the common denominator giving 15/24+20/24=35/24.

Answer 45

ok 34/5x-23/10x = 1 1/2x? (:

Answer 46

I got 4 1/2x.
Getting a common denominator you get 68/10x-23/10x=45/10x=4 1/2x.

Answer 47

but 3-2 =1?

Answer 48

is that 3 and 4/5x or 34/5x do you have an x value? Or are you solving for x? Or not?

Answer 49

it is 3 and 4/5x - 2 and 3/10 x you dont solve for x (:

Answer 50

Okay, so you have 3 and 8/10x- 2 and 3/10x that gives 1 1/2x. Yes you're right.

Answer 51

yeah ! (: ok 16 and 5/16- 10 and 7/32 (:

Answer 52

malevolence19 ?

Answer 53

Sorry, I was helping someone else. 6 and 3/32 after you get a common denominator.

Answer 54

its ok what about 5 and 5/8 - 4 and 2/5

Answer 55

1 and 9/40

Answer 56

42 and 5/6 + 22 and 7/12 (:

Answer 57

65 and 5/12

Answer 58

6 and 3/4x+ 2 and 5/8x (:

Answer 59

12 and 3/8x

Answer 60

5 and 7/8 + 6 and 3/5

Answer 61

?

Answer 62

12 and 19/40

Answer 63

4/5-2/3

Answer 64

?

Answer 65

2/15

Answer 66

15/16+1/2 (:

Answer 67

1 7/16

Answer 68

1 and 7/ 16 ?

Answer 69

Yes

Answer 70

11/12+ 3/4 (: