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3241004551 [841]
3 years ago
11

For what value of x does 25x=5x2-3?

Mathematics
2 answers:
Leokris [45]3 years ago
3 0
I might be wrong but I'll give it a shot, you subtract the 5x from the right side and put it on the left with makes it 20x=2-3. Then subtract the 3 from the 2 which makes it 20x=-1. So it would be -0.05.

I'm not 100% sure. But his is my guess.
Savatey [412]3 years ago
3 0
Important:  Use " ^ " to indicate exponentiation:  <span>25x=5x^2-3.

Rearrange these terms in descending powers of x:  5x^2 - 25x - 3 = 0

This is a quadratic equation.  To solve it, you could use a graphing calculator, the quadratic formula, completing the square or other approaches.

</span>Let's complete the square of 5x^2 - 25x - 3 = 0:

5(x^2 - 5x)                        = 3
5(x^2 - 5x + 25/4 - 25/4)   = 3
5(x-5/2)^2    - 125/4          = 3 = 12/4
5(x-5/2)^2                         =137/4
  (x-5/2)^2     -25/4           = 137/20
  (x -5/2)^2                        = 125/20+137/20 = 162/20= 81/10
Taking the sqrt of both sides, we get:

  x-5/2                               = plus or minus 9/sqrt(10)
Then:

x = 5/2 plus or minus 9sqrt(10) / 10, or
x = 25/10 plus or minus 9sqrt(10)/10, or

       25 plus or minus 9sqrt(10)
x = -------------------------------------
                      10
                    
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Solve the following system of equations using the elimination method 5x - y = 10 x + 3y = 4​
Naddik [55]

Answer:

5x - y = 10x + 3y = 4

5x - y = 4..... 1

10x + 3y = 4.....2

multiply by -2 in eq 1 in both sides

-10x + 2y = -8

10x +3y = 4

eliminate one variable by adding the equations

5y = -4

y = - 4/5

sub the value of y in..1

5x - y = 4

5x + 4/5 = 4

5x = 16/5

divide by 5 on both sides

x = 16/25

(x ; y)

(16/25 ; -4/5)

7 0
2 years ago
Gwendolyn is asked to solve the equation -43 – 3) = 20. She sh
choli [55]

Answer:

-4x + 12 = 20 is incorrect. she added 12 to 20 instead of subtracting 12 from both sides.

Step-by-step explanation:

It should have been, write problem

-4(x - 3) = 20

Use distributive property.

-4x + 12 = 20

subtract 12 from each side

-4x =8

divide each side by -4

x = -2

4 0
2 years ago
S÷5=5 how do u solve this I'm not sure if 25 is correct
Juli2301 [7.4K]
Given s÷5=5
   ⇒s=5×5
  ⇒s=25
3 0
3 years ago
Read 2 more answers
Two sides and an angle are given. determine whether the given information results in one triangle, no triangle, three triangles,
Crazy boy [7]
We are given 2 sides 18.7, 16.1 and a NON-included angle.
We have to calculate the altitude of the triangle.
altitude = 18.7 * sine (35)
altitude = 18.7 * 0.57358
altitude = <span> <span> <span> 10.725946 </span> </span> </span>
In this case, side c is greater than the altitude and is less than side a so 2 two triangles will be formed.

Source:
http://www.1728.org/trigssa.htm





3 0
2 years ago
.I want a way to solve this question​
Verdich [7]

Check the picture below.

so then γ ≈ 180 - 69 - 43, γ ≈ 68.

8 0
2 years ago
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