hey yall. i have tried and tried these so pls help me!!! thanx so much.
1/2d + 3/8 = -2d
this one, you have to write an equation.i can solve it!
Twice the greater of two conseutive odd integers is 13 less than three times the lesser. Find the intergers
yall please dont tell me i need to do my own homework!!!
2006-09-07 13:54:11 · 6 answers · asked by Ashley 2 in Education & Reference ➔ Homework Help
yall?
step by step
1/2d + 3/8 = -2d
1/2d=-3/8-2d----------moved 3/8 to other side change to -3/8
1/2d+2d=-3/8-----------moved -2d toother side change to +2d
1/2d+2/1d=-3/8-------- changed 2d to 2/1d. it is the same thing
1/2d+4/2d=-3/8--------changed 2/1 to 4/2. it is the same thing
5/2d=-3/8-------1/2d+4/2d=5/2d
20/8d=-3/8 --------------changed 5/2 to 20/8. it is same thing
20d=-3 ----------------------remove /8 from buth side
d=-3/20 ---------------------- d is -3 divided by 20
x+2 is the next odd integer
3x-13 = 2(x+2)
3x-13 = 2x+4
x-13=4
x=4+13
x=17
next integers are 17 and 19
2006-09-07 13:56:37 · answer #1 · answered by Anonymous · 1⤊ 1⤋
So the first one you are solving for D
Move the d's to one side of the equation and the numbers to the other 1/2d +3/8 +2d = 0, then 2-1/2d = -3/8
multiply everything by 8
20d = -3
d=-3/20
x will be the smaller integer, so x+2 is the next odd integer
2(x+2) = 3x-13
2x+4 = 3x -13
4=x-13
17=x
so the integers are 17 and 19
2006-09-07 21:07:07 · answer #2 · answered by Dennis K 4 · 0⤊ 1⤋
1/2d + 3/8 = -2d
move d to only one side
1/2d + 2d = -3/8
____ _____
1/2 1/2
3d = -3/16
d=-1/16
twice a numbuse trial and error? I am not sure how to even start this one sorry 2g = 3l -13?
twice greater = thrice lesser minus 13
2006-09-07 21:00:55 · answer #3 · answered by answerseeker 2 · 0⤊ 1⤋
U can change it in to a fraction
.5d+.375=-2d
now subtract .375 from both sides
it becomes
.5d= -2.375
Now divide .5 by both sides, this will get the variable (d) by it self
d= -4.75
hit me up on yahoo messager if u wanna try to work it out 2gether for the next one if u'd like
REMEBER 2 test it out, just plug in d and see if it's correct.
Here is a site on changing a fraction to a decimal, and a decimal to a fraction
http://experts.about.com/q/Basic-Math-657/decimal-fraction-conversion.htm
2006-09-07 21:02:36 · answer #4 · answered by Gifted and Gracious 3 · 1⤊ 1⤋
not sure about the first one but the equation for the second one is
2(x+2)=3x-13
the first integer is x and the second is x+2
2006-09-07 21:06:25 · answer #5 · answered by afireinsideme [DF] 6 · 1⤊ 1⤋
lol you should get a tutor.
2006-09-07 20:56:29 · answer #6 · answered by thesunnshynne 5 · 0⤊ 3⤋