Question

i have some algebra equations that i have done. can you check them? (i will post them soon).

Answer 1

a) k/3 + k/2 =

Answer 2

b) 4/5 x - 1/10 x

Answer 3

c) 3/8 z - 1/4 z + 1/2 z

Answer 4

d) s/5 - s/3 + s

Answer 5

e) 1 1/2 m - 3/4m + m/8

Answer 6

and.....

Answer 7

f) -4a/5 + 1/10a - 3a

Answer 8

tell me what answers you get, and then i will see if i have the same. pleasee....?

Answer 9

a) \[\frac{5k}6\]
b) \[\frac7{10x}\]
c) \[\frac5{8z}\]
d) \[\frac{13s}{15}\]
e) \[\frac{m}{8}-\frac{1}{4m}\]
f) \[\frac1{10a}-\frac{19a}5\]

Answer 10

okay... well for a b and c i have the same. for d i have - 17/15s. for e i have 6/8m. for f i have - 3 and 9/10a

Answer 11

this is how i figured it out. d:

Answer 12

from d down it was a bit hard to know what the question was--since you didn't use parenthesis.

Answer 13

no () in book either.

Answer 14

ust a min.

Answer 15

d could have been:
\[\frac{s}5 - \frac{s}3 + s\] which is what i assumed, or
\[\frac{s}5-\frac{s}{3+s}\] which would be a harder problem, lol

Answer 16

\[s/5 - s/3 + s : \space \space \space \space \space \space \space \space \space s-5-s/3 = 3s/15 - 5s/15 \space \space \space that equals -2s/15 \space \space \space \space \space -2s/15 + s = \]

Answer 17

thats d

Answer 18

dang cant see it.

Answer 19

never mind...

Answer 20

bye thanks

Answer 21

lol dont give up so quickly :P

Answer 22

ooooh I KNOW!

Answer 23

stupid "order of operations"

Answer 24

yep, thanks! you really actually did help a lot!!!

Answer 25

for d:
I find it easier to start by factoring out the variables (makes it easier for me to see):
s/5 - s/3 +s
\[\frac15(s) - \frac13(s)+ s\]
combine your fractions:
\[-\frac2{15}(s)+s\]
combine those fractions (convert the +s to +15s/15 so its the same denominator)
\[\frac{15}{15}(s) - \frac2{15}(s) = \frac{15-2}{15}(s)==\frac{13}{15}(s)\]
or
\[\frac{13s}{15}\]

thats how I like to work these, of course--if your way is easier for you and works, do that!

Answer 26

you are very much a genius. that really helps!!!! you should become my math teacher!

Answer 27

hah

Answer 28

what about for e?

Answer 29

e is 7/8m

Answer 30

because: 1 1/2m is 3/2m and 3/4 m, normal. m/8 = 1/8 times m.

3/2 time m - 3/4 times m is 3/4 times m. 3/4 time m - 1/8 times m is 7/8

Answer 31

Its a little bit harder, but:
I'd start by converting that mixed fraction in the front,
1 1/2 = 3/2
so 1 1/(2m) = 3/(2m)
that gives us:
\[\frac3{2m}-\frac3{4m}+\frac{m}8\]
convert that 2m denominator to 4m by multiplying 2/2 through it:
\[\frac6{4m}-\frac3{4m}+\frac{m}8\]
6-3 = 3 so:
\[\frac3{4m}+\frac{m}8\]
although you can simplify this a bit, id leave it there and call that my answer.

Answer 32

okay..

Answer 33

what i dont get, is f) how is -4a/5 + 1/10 a is -7/10a. its -9/10a!!!

Answer 34

i solved it right, but for some reason i keep getting -9/10.

Answer 35

which is sad, cause i should know how to solve that.

Answer 36

combining
\[\frac{-4a}5+\frac1{10a}\]
is a bit tricky, in fact in my first answer, i didn't even do it. the reason is the variable is in the numerator of one and the denominator of the other... if you would like to do it, remember you need to multiply through and get the same denominator... in this case:
10a is what we need.
5 is what we have, so we need to multiply through 2a to the fraction on the left:
\[\frac{-4a}{5}*\frac{2a}{2a}+\frac1{10a}\]
\[\frac{-8a^2}{10a}+\frac1{10a}\] now we can combine these two, since they have the same denominator:
\[\frac{1-8a^2}{10a}\]

Answer 37

oh. i just did 5 * 2 is 10. -4a * 2 is 8!

Answer 38

yeah this one is a bit more tricky :P

Answer 39

okay. thank!

Answer 40

you

Answer 41

bye now!