Hi,

   | Note: 

 

Hi,

RE TY: Perhaps did not understand Your question:

X^2 = 676  and Y^2 = 841, are You wanting the product ?

If X= 6+8+12  = 26

   Y= 9+13+7  = 29

Then

  X^2 = 

  Y^2 = 

 

Hi,

 3 chairs and 1 table cost rs.900 and 5 chairs and 3 table cost rs.2100

Let x and y represent the cost of a chair and a table respectively

  3x +  y = 900

  5x + 3y = 2100   |Multiplying the 1st Eq by 3 and subtracting from 2nd EQ

      -4x = -600

         x = 150, chair cost.  Table Cost is  rs. 450

and...cost of 4 chairs and 1 table is?

  = rs. 1050

 

Hi,

parabola with vertex (1,-9) and directrix y = -9-7

Note: The standard form is , where  the focus is (h,k + p) and Directrix is y = (k-p)

 p = 7, 4p = 28 ,  standard form is ,  Vertex form: y = 1/28(x-1)^2 - 9 

the vertex form of a Parabola opening up(a>0) or down(a<0),  

where(h,k) is the vertex  and  x = h  is the Line of Symmetry

 

Hi,

Note: Post each question separately, not necessary to use pictures,

just list Eqs with the following instructions:

Solve the system of equations by using the inverse of the coefficient matrix.

 x+3y = -9 

5x+8y = -31                             

 = -7  

  Note: How the above numbers flipped and the 2 minuses

 = (1/-7)





and...



Ordered pair (-3,-2) the solution for this system of equations

Checking our answer using the Elimination Method:

x+3y= -9 

5x+8y= -31  |multiplying 1st EQ by 5 and Subtracting  from the 2nd EQ

 -7y = 14

  y = -2   and x = -3  as 

(x,y) Ordered pair (-3,-2) the solution for this system of equations

 

Hi,

 <=0}}}

{ x | x ≤ -8  or 3 ≤ x < 4}}}

Note graph of 

 

Hi,

what fraction of an hour is 35 minutes? 

 

Hi,

 1000(1.03)^20 = $1806.11

 500(1.07)^20 =  $1934.84

 

Hi,

In how many ways can 3 boys and 5 girls be arranged in a row so that all the 3 boys are together  

I. letting the 3 boys be considered 1 unit 

II. and taking into consideration: they, themselves can be arranged 6 different ways

  ways

  

 

Hi,

Note: Post each question separately, not necessary to use pictures,

just list Eqs with the following instructions:

Solve the system of equations by using the inverse of the coefficient matrix.

 x+2y = -12

2x+2y = -16                               

 = -2  

 

 = (1/-2)





and...



Ordered pair (-4,-4) the solution for this system of equations

Checking our answer using the Elimination Method:

 x+2y = -12

2x+2y = -16   |Subtracting 1st EQ from the 2nd

  x = -4   and y = -4  as 

(x,y) Ordered pair (-4,-4) the solution for this system of equations

 

Hi, Previously Posted

Calculate the Expected Value(Sum of PX) = μ = 0

Then Calculate the Variance(Sum of P[X-μ]^2) = 2.94

σ =  

X	P	PX	P[X-μ]^2    

-4	0.02	-0.08	0.32        Note:  

-3	0.07	-0.21	0.63

-2	0.1	-0.2	0.4

-1	0.15	-0.15	0.15

0	0.3	0	0

1	0.18	0.18	0.18

2	0.1	0.2	0.4

3	0.06	0.18	0.54

4	0.02	0.08	0.32

Sum		0	2.94

 

Hi,

Calculate the Expected Value(Sum of PX) = μ = 0

Then Calculate the Variance(Sum of P[X-μ]^2) = 2.94

SD =  

X	P	PX	P[X-μ]^2    

-4	0.02	-0.08	0.32   

-3	0.07	-0.21	0.63

-2	0.1	-0.2	0.4

-1	0.15	-0.15	0.15

0	0.3	0	0

1	0.18	0.18	0.18

2	0.1	0.2	0.4

3	0.06	0.18	0.54

4	0.02	0.08	0.32

Sum		0	2.94

 

Hi,

: 

: 

t-Test: Two-Sample Assuming Unequal Variances			

			

	1	2	

Mean	589	684.9	

Variance	1816	6760.988889	

SD	42.61455151	82.22523268	

Observations	10	10	

Hypothesized Mean Difference	0		

df	14		

t Stat	                -3.274546662		p = .0005

P(T<=t) one-tail	0.002767826		

t Critical one-tail	1.76130925		

P(T<=t) two-tail	0.005535651		

t Critical two-tail	2.144788596		p= .016

   .0005 < .016 , reject null hypothesis

Group 1 eats faster than group 2

 

Hi,

Note:  general Procedure is to first the eliminate one of the variables using a pair of EQs

  

     |Multiplying 2nd Eq by 3 and adding to the first

     

  

      | Substituting for y and z 

    x =  -.5915

    y = 

    z =  

 

Hi

Find the slope and y intercept of the line in the given equation 

y= 2/3x-8

y = mx + b

  m =  and y-intercept is  - 8

 

Hi,

The length of a computer case times its width is 

 

Hi,

 , the smaller of two number is 9 less than the larger

Question states***

 y + x = 38    || y = x-9

(x-9) + x = 38

   2x - 9 = 38

     2x = 47

      x = 47/2 0r    and y =   ( 9 less)



and...

 +   = 38

 

Hi,

 

Hi,

36 = 9x^2 – 4y^2



 y = ± 3/2x

Standard Form of an Equation of an Hyperbola opening right and  left is:

   with C(h,k) and vertices 'a' units right and left of center,  

 & Asymptotes Lines passing thru C(h,k), with slopes  m =  ± b/a 

 

Hi,

6.2 () miles taking 40min ()

 

 

Hi,

If you meant:

 

Hi,

f(x) = -2(x+3)^2  

V(-3,0) and line of symmetry is x = -3

Note: the vertex form of a Parabola opening up(a>0) or down(a<0),  

where(h,k) is the vertex  and  x = h  is the Line of Symmetry

 

Hi,

Question states*** Traveling in opposite directions for 2 hours

	r	t	  D= rt

train	164	2	328

pigeon	40	2	80

After two hours, the pigeon and the train are 408 mi apart

 

Hi,

   |Multiplying thru by 24 so as all denominators = 1

     |Solve for D

           

            

     

 

Hi,

in a class of 28 students, 18 pass the final: 18/28 = .6429  or 64.29% passed 

 

Hi,

If I am understanding your question properly

P = .15x -28    || As in y = mx + b, where m is the slope and b the y-intercept

m = .15

 

Hi

 b = 3, a = -1, c = -2

 

Hi

each worked 5 hours, except Gerry, Who was 45 minutes late. (together worked )

Each earned:  847/19.25 = 44 pecos/hr 

Gino, 220

Gary, 220

Gerry, 176 + 11 = 187

Gemo, 220

 

Hi,

19/31 = .612903225806451  

 

Hi,

x	y = (-4/3)x + 1

-6	9

-3	5

6	-7

Ordered Pairs: (-6,9), (-3,5), (6,-7)

Plotting the coordinates and connecting with a line.

Line is the graph ofy = (-4/3)x + 1  

 

Hi,

Write in decimal form 

(3 x 10^1) + (4 x 10^0)



 30 + 4 = 34