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GuDViN [60]
3 years ago
7

**60 POINTS** How to solve step-by-step...:

Mathematics
2 answers:
Katen [24]3 years ago
7 0
<span>sqrt(3x+7)=x-1 </span>One solution was found :                  <span>      x = 6
</span>Radical Equation entered :

<span>     √3x+7 = x-1

</span>

Step by step solution :<span>Step  1  :</span>Isolate the square root on the left hand side :

     Radical already isolated 
<span>     √3x+7 = x-1

</span>

<span>Step  2  :</span>Eliminate the radical on the left hand side :

     Raise both sides to the second power
<span>     (√3x+7)2 = (x-1)2

</span>     After squaring 
<span>     3x+7 = x2-2x+1

</span>

<span>Step  3  :</span>Solve the quadratic equation :

     Rearranged equation
<span>     x2  - 5x  -6 = 0
</span>
     This equation has two rational roots:
     <span>  {x1, x2}={6, -1}
 </span>

<span>Step  4  :</span>Check that the first solution is correct :

     Original equation
<span>     √3x+7 = x-1

</span>     Plug in 6 for  x 
<span>      √3•(6)+7 = (6)-1

</span>      Simplify
     <span> √25 = 5
 </span>     Solution checks !!
     Solution is: 
<span>      x = 6
</span>

<span>Step  5  :</span>Check that the second solution is correct :

     Original equation
<span>     √3x+7 = x-1

</span>     Plug in  -1 for  x 
<span>      √3•(-1)+7 = (-1)-1

</span>      Simplify
     <span> √4 = -2
 </span>     Solution does not check 
      2 ≠ -2 

One solution was found :                  <span>      x = 6</span>
irakobra [83]3 years ago
6 0
The answer is x = 6 and I did the math in my head so fast
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Margaret [11]

Answer:

The 64th term of the arithmetic sequence is -1075.

Step-by-step explanation:

Arithmetic sequence:

In an arithmetic sequence, the difference between consecutive terms, called common difference, is always the same.

The nth term of an arithmetic sequence is given by:

a_n = a_1 + (n-1)d

In which a_1 is the first term.

−4,−21,−38

First term -4, so a_1 = -4

Common difference of d = -38 - (-21) = -21 - (-4) = -17

Thus

a_n = a_1 + (n-1)d

a_n = -4 - 17(n-1)

Find the 64th term of the arithmetic sequence

This is a_{64}. So

a_n = -4 - 17(n-1)

a_{64} = -4 - 17(64-1) = -4 - 1071 = -1075

The 64th term of the arithmetic sequence is -1075.

8 0
3 years ago
A prism has a length of 5 meters, height of 6 meters, and width of 1 meter.
Svetradugi [14.3K]

Answer: 30 m3 (meters cubed)

Step-by-step explanation:

To get the volume of a rectangular prism, multiply the width times the length times the height.

1 x 5 x 6 = 30

Add the unit label

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3 years ago
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2/5(g - 7) = 3 <br> can i please get some help..
Flura [38]

Answer:

14.500

Step-by-step explanation:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    (2)/(5)*(g-7)-(3)=0

Step by step solution :

STEP

1

:

           2

Simplify   —

           5

Equation at the end of step

1

:

  2              

 (— • (g - 7)) -  3  = 0

  5              

STEP

2

:

Equation at the end of step 2

 2 • (g - 7)    

 ——————————— -  3  = 0

      5        

STEP

3

:

Rewriting the whole as an Equivalent Fraction

3.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  5  as the denominator :

        3     3 • 5

   3 =  —  =  —————

        1       5  

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

3.2       Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

2 • (g-7) - (3 • 5)     2g - 29

———————————————————  =  ———————

         5                 5  

Equation at the end of step

3

:

 2g - 29

 ———————  = 0

    5  

STEP

4

:

When a fraction equals zero

4.1    When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

 2g-29

 ————— • 5 = 0 • 5

   5  

Now, on the left hand side, the  5  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  2g-29  = 0

Solving a Single Variable Equation:

4.2      Solve  :    2g-29 = 0

Add  29  to both sides of the equation :

                     2g = 29

Divide both sides of the equation by 2:

                    g = 29/2 = 14.500

One solution was found :

g = 29/2 = 14.500

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Answer:

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Step-by-step explanation:

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