Question about Bagatrix Algebra Solved! 2005 (105101) for PC

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4x+8y=20 || /4

x+2y=5

x=5-2y

-4x+2y=-30 || /2

-2x+y=-15

-2(5-2y)+y=-15

-10+4y+y=-15

5y=-5

y=-1

x=5-2y || y=-1

x=5-2(-1)

x=5+2

x=7

Posted on Mar 10, 2009

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Posted on Jan 02, 2017

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This is best written as two separate equations:

8x+3y = -23 and 34x+ 5y = -23

Solving the first one for x:

8x = -23-3y

x = -23/8 - 3/8y

Substituting this value for x into the second equation:

34(-23/8 - 3/8y) + 5y = -23

-97.75 - (34)(.375)y + 5y = -23

-97.75 - 12.75y + 5y = -23

-97.75 -7.75y = -23

-7.75y = 97.75-23=74.75

**y **= -74.75/7.75 =** -9.645161**

Substitution back into the equation for x:

x = -23/8 - 3/8(-9.645161)

x = -2.875 + 3.616935

**x** **=.741935**

8x+3y = -23 and 34x+ 5y = -23

Solving the first one for x:

8x = -23-3y

x = -23/8 - 3/8y

Substituting this value for x into the second equation:

34(-23/8 - 3/8y) + 5y = -23

-97.75 - (34)(.375)y + 5y = -23

-97.75 - 12.75y + 5y = -23

-97.75 -7.75y = -23

-7.75y = 97.75-23=74.75

Substitution back into the equation for x:

x = -23/8 - 3/8(-9.645161)

x = -2.875 + 3.616935

Dec 12, 2014 | Bagatrix Algebra Solved! 2005 (105101) for...

Dear Anne I am old school but I think it works lide this..

6x+21+4x=-9

so add 9 to both sides

6x+30+4x=0

so 6x+4x+30=0

so 10x+30=0

so x= -3

I hope this helps.

6x+21+4x=-9

so add 9 to both sides

6x+30+4x=0

so 6x+4x+30=0

so 10x+30=0

so x= -3

I hope this helps.

Oct 09, 2011 | Office Equipment & Supplies

- Number of 0.25 coins is x, number of 0.10 coins is y and number of 0.05 coins is z.
- First equation is 0.25x+0.10y+0.05z=36.
- You also know that z=4x and y=x+30.
- You substitute that in first equation and you get: 0.25x+0.10*(x+30)+0.05*4x=36 or 0.25x+0.10x+0.2x=36-3 or 0.55x=33
- Now you know that x is 33/0.55=60 and y=x+30=90 and z=4x=240.

Aug 18, 2011 | Office Equipment & Supplies

First step is to find inequality in the form y<f(x), in this case **y<5-0.5x**. Then graphing it. See captured image

Feb 18, 2011 | Texas Instruments TI-84 Plus Silver...

Type solve(exp1 and exp2 and exp3, {x,y,z})

See cap images

See cap images

Dec 15, 2010 | Texas Instruments TI-89 Calculator

Hello,

You are talking of the distributivity of multiplication with respect to the addition or subtraction. The only term where you have multiplication and addition/subtraction is the one with parentheses because

4(5-6y) = 4*(5-6y). * means multiply by

Distributing the product consists in removing CORRECTLY the parentheses.

I consider the term alone

4*(5-6y) = 4*5 +4*(-6y)= 20 -4*6*y = 20 -24*y

You put this result in a package and replace it where it was it the original expression.

So

8*y -(package) +20= Replace package

8*y -(20-24*y)+20 = 8*y -20 -(-24y) + 20 Remember -*(-) = +

8*y -20 +24*y +20= Remember -20+20 =0

8*y -20 +20 +24*y= Addition is commutative

8*y +24*y = 32*y

Let y be an orange 8 oranges + 24 oranges =32 oranges.Coclusion

**8y-4(5-8y)+20 = 32y**

You are talking of the distributivity of multiplication with respect to the addition or subtraction. The only term where you have multiplication and addition/subtraction is the one with parentheses because

4(5-6y) = 4*(5-6y). * means multiply by

Distributing the product consists in removing CORRECTLY the parentheses.

I consider the term alone

4*(5-6y) = 4*5 +4*(-6y)= 20 -4*6*y = 20 -24*y

You put this result in a package and replace it where it was it the original expression.

So

8*y -(package) +20= Replace package

8*y -(20-24*y)+20 = 8*y -20 -(-24y) + 20 Remember -*(-) = +

8*y -20 +24*y +20= Remember -20+20 =0

8*y -20 +20 +24*y= Addition is commutative

8*y +24*y = 32*y

Let y be an orange 8 oranges + 24 oranges =32 oranges.Coclusion

Sep 10, 2009 | The Learning Company Achieve! Math &...

x=7

y=-1

y=-1

Jan 30, 2009 | Bagatrix Algebra Solved! 2005 (105101) for...

V (2,0) and Focus (2,2)

since the focus is 2 units above the vertex, the parabola opens upward

vertex (h,k)

a is the focal length (distance between the vertex and the focus)

a = 2

(2 units above the vertex)

(x-h)^2 = 4a (y-k)

(x-2)^2 = 4(2) (y-0)

x^2 - 4x + 4 = 8 (y)

x^2 - 4x + 4 = 8y

x^2 - 4x - 8y + 4 = 0

**Answer: "(x-2)^2 = 8 (y)" or in expanded form "x^2 - 4x - 8y +4"

since the focus is 2 units above the vertex, the parabola opens upward

vertex (h,k)

a is the focal length (distance between the vertex and the focus)

a = 2

(2 units above the vertex)

(x-h)^2 = 4a (y-k)

(x-2)^2 = 4(2) (y-0)

x^2 - 4x + 4 = 8 (y)

x^2 - 4x + 4 = 8y

x^2 - 4x - 8y + 4 = 0

**Answer: "(x-2)^2 = 8 (y)" or in expanded form "x^2 - 4x - 8y +4"

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Nov 22, 2013 | Bagatrix Algebra Solved! 2005 (105101) for...

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Usually answered in minutes!

4x+8y=20

-4x+2y=-30

2x-8y=20

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