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lesya692 [45]
3 years ago
12

A cube with an edge of length has a volume of 64 units. What is the length of ? Hint: Volume of a cube is LxWxH.

Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
5 0

Answer:

it is 4

Step-by-step explanation:

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What is the solution of this system of linear equations? 3y = 3/2x + 6 1/2y –1/4 x = 3
Sati [7]
The answer is:  [C]:  "no solution" .
_________________________________________________________

Given:  3y = 3/2 x + 6 ; Multiply each side by "2" ; to get rid of the fraction

              2 * { 3y = 3/2 x + 6 } ;  to get:  6y = 3x + 12 

           
Given:  1/2 y –1/4 x = 3 ;  Multiply EACH SIDE by "4" ; to get rid of the fraction ;


            4 * { 1/2 y – 1/4 x = 3 } ;  to get:  2y – x = 12 ;
______________________________________________
So we have:

6y = 3x + 12 ;

2y – x = 12 ; 
__________________________________________
Multiply BOTH side of the "second equation" by "-1" ;

-1 * { 2y – x = 12 } ; 

to get :   x – 2y = -12  ;  

Now, add "2y" to each side of the equation;  
 to isolate "x" on one side of the equation; & to solve for "x" ; 

  x – 2y + 2y = -12 + 2y ; 

to get:  x = 2y – 12 ; 

Now, consider the "first equation" ; 

6y = 3x + 12 ; 
 
Divide EACH SIDE of this equation by "3" ; 

6y / 3 = (3x + 12) / 3 ; 

to get:  2y = x + 4 ; 

Divide EACH SIDE of the equation by "2" ; 

2y/ 2  = ( x + 4) /2 ; 

to get:  y = (x + 4) / 2 ;
 
Now plug in our calculated value for "x" ; which is:   

        " x = 2y – 12 " ; for the "x" values


 y = [ (2y – 12)] + 4)] / 2 ; 

y = (2y – 8 )/ 2 

2y  = 2y  – 8 ??? ;; 

The answer is:  [C]:  "no solution" .
___________________________________________________

7 0
3 years ago
Read 2 more answers
Shorney Construction Company bids on projects assuming that the mean idle time per worker is 72 or fewer minutes per day. A samp
joja [24]

Answer:

Null hypothesis : H_0 = \mu \leq 72

Alternate hypothesis : H_a = \mu = 72

Step-by-step explanation:

To Find : State the hypotheses to be tested.

Solution

Mean = 72

Standard deviation = 20

N = 30

Claim : Shorney Construction Company bids on projects assuming that the mean idle time per worker is 72 or fewer minutes per day.

So, Null hypothesis : H_0 = \mu \leq 72

Alternate hypothesis : H_a = \mu = 72

7 0
4 years ago
I need help with this trigonometry problem.
irina1246 [14]
The sum of all 3 angles in a triangle is 180
180-44=136
And you know that angle A is over 90 degrees so I believe it is 100 leaving angle b to be 36
4 0
3 years ago
What is the slope of (-2,5) and (-2, -6)
valentina_108 [34]

Answer:

B

Step-by-step explanation:

Apply slope intercept form, y2-y1 / x2 - x1. -6 is y2, -2 is x2, 5 is y1, and -2 is x1.

-6 - 5 / - 2 - (-2)

-11 / -2 + 2

-11 / 0

0

The slope is 0. B is your answer. I hope this helps you!

5 0
3 years ago
At which points are the equations y = x2 + 5x − 2 and y = x + 1 equal?
klemol [59]

Answer:

When they are equal, y=y, so we can say:

x^2+5x-2=x+1  subtract x from both side

x^2+4x-2=1  add 2 to both sides

x^2+4x=3, now add half the linear coefficient squared, (4/2)^2=4

x^2+4x+4=3+4 now the left side is a perfect square

(x+2)^2=7  now take the square root of both sides

x+2=±√7  subtract 2 from both sides

x=-2±√7

x=-2+√7 and -2-√7

y=x+1 the two points where these equations are equal are:

(-2-√7, -1-√7) and (-2+√7, -1+√7)

or approximately:

(-4.65, -3.65) and (0.65, 1.65)

Step-by-step explanation:

5 0
3 years ago
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