All Answers 358179 Answers

0

I'm still lost can you please go on ?

GuestOct 3, 2012

0

draw a straight line from the angle at the top (42), it will give two right angled triangles-the one on the left will have 22 degrees at the top while the one on the left will give you the 20 degrees at the top.proceed from there good luck

GuestOct 3, 2012

0

THIS IS WRONG the answer is 3x-6=7 which become 3x = 7+6 which is 3x= 13 so X = 13/3 = 4.33333333333333(RECURRING)333333333

GuestOct 3, 2012

+3146

0

b+25(1,6a+3,2b)-40a
b+25*(1.6a+3.2b)-40a
b+25*1.6a+25*3.2b-40a
b+25*3.2b-40a+25*1.6a
b+80b-40a+40a
81b

adminOct 3, 2012

+3146

0

[input]plot( 3x-6 )[/input]
[input]3x-6 = 0[/input]
[input]diff( 3x-6, x )[/input]

adminOct 3, 2012

+3146

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[input]21* 3/8[/input]

adminOct 3, 2012

+3146

0

[input]3^(x-1)-3^(x)=-6[/input]

adminOct 3, 2012

+3146

0

[input]-2p=-38[/input]

adminOct 3, 2012

+3146

0

HateMath!:
containing 550 liter of water is being filled with water at the rate of 75 liter per minute

550L+x*75L/min = 550+x*75

HateMath!:
75 liter per minute from a full 1600 liter tank

1600L-75L/min = 1600-x*75

HateMath!:
How lon will it be before the two tanks have the same amount of water?

[input]550+x*75 = 1600-x*75[/input]

[input]plot( 550+x*75, 1600-x*75, x=0..10)[/input]

550+x*75 = 1600-x*75 |-1600
550+x*75 -1600 = 1600-x*75-1600
-1050+x*75 = -x*75 | +x*75
-1050+x*75+x*75 = 0 | +1050
2*(x*75) = 1050 | /2
x*75 = 525 | / 75
x = 525 / 75
x = 7

adminOct 3, 2012

0

Okay, so I phoned a friend and got that one sorted out. I have one more factorising question that I'm stuck on now. 2x^2+13x-7

GuestOct 3, 2012

+28

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What is this suppose to be? A coordinate graph?

MathIsHardOct 3, 2012

0

GuestOct 3, 2012

Oct 2, 2012

0

Hey. The answer to your problem is p+19. You basically divide both sides by 2. Hope this helped.

GuestOct 2, 2012

0

sddao:
I am just learning this stuff and of course am confused...

I do not under stand your 3 step 7x=7-6

could you please explain to me how you got that equation from 3x-10x+6=7

Like I said, this is a learning process...so forgive me if I sound dumb

You can subtract or add anything on either side, as long as you add it on the other side as well.

So he took 3x-10x+6=7 => minus 6, so it becomes 3x-10x = 7-6.
3x-10x = 7x and 7-6 = 1 .... so 7x = 1. To get x, you divide by the number of x's.
7x / 7 = x, 1 / 7 = 1/7.

x = 1/7

GuestOct 2, 2012

+14

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3^(x-1)-3^(x)=-6 => -(3^χ)/3-3^χ=-6 =>3^-3*3^χ=-18 => -2*3^χ=-18 => 3^χ=9
=> 3^χ=3^2 => χ=2

HellasOct 2, 2012

+3146

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[input]solve( 2a+c=-10, b-c=15, a-2b+c=-5)[/input]

adminOct 2, 2012

0

I am just learning this stuff and of course am confused...

I do not under stand your 3 step 7x=7-6

could you please explain to me how you got that equation from 3x-10x+6=7

Like I said, this is a learning process...so forgive me if I sound dumb

GuestOct 2, 2012

+14

0

3x-2(5x-3)=7 => 3χ-2*5χ+2*3=7 => 3χ-10χ+6=7 => 7χ=7-6 => 7χ/7=1/7 =>χ=1/7

HellasOct 2, 2012

+28

0

I think this problem uses the distributive property.
[input]27= 3c-3(6-2c)[/input]

MathIsHardOct 2, 2012

+28

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[input]21/1*3/8[/input]

MathIsHardOct 2, 2012

+28

0

MathIsHardOct 2, 2012

+28

0

MathIsHardOct 2, 2012

0

i do not think so

GuestOct 2, 2012

Oct 1, 2012

0

Solving Systems Of Equations in Three Variables

GuestOct 1, 2012

0

(-3x+3)/-3 = -3x/-3 + 3/-3
= 3x/3 +-1
= x -1

GuestOct 1, 2012

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