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mr Goodwill
6 days ago
15

Lily begins solving the equation 4(x – 1) – x = 3(x + 5) – 11. Her work is shown below. 4(x – 1) – x = 3(x + 5) – 11 4x – 4 – x

= 3x + 15 – 11 3x – 4 = 3x + 4
Mathematics
2 answers:
Zina [3.9K]6 days ago
4 0

Finding a solution to an equation entails determining the value of x that renders the equation valid.

We must reverse the operations applied to x to isolate it.

4(x-1)-x = 3(x + 5)-11\\Distributing \; 4 \; and \; 3 \; in \; right \; and \; left \; side \; of \; the \; equation\\\\ 4x-4-x=3x+15-11\\Combine \; like \; terms\\\\3x-4=3x+4\\Subtract \; 3x \; on \; both \; sides\\\\3x-3x-4=3x-3x+4\\ Combine \; like \; terms\\\\-4=4

Final Note:

The resulting equation is false, indicating that there is NO solution. Graphically, both equations will be represented as parallel lines that do not intersect.

AnnZ [3.9K]6 days ago
4 0

Conclusion:

Final determination: No solution exists for this equation.

Detailed Explanation:

4 (x - 1) - x = 3 (x + 5) - 11, the solving process would involve: 4x - 4 - x = 3x + 15 - 11; 3x - 4 = 3x + 4. While the steps seem appropriate, continuity leads to the cancellation of x, confirming that there is no solution as no value for x can satisfy the equation, represented graphically as two parallel lines that never intersect.

Final determination: No solution exists for this equation.

You might be interested in
Find the point on the circle x^2+y^2 = 16900 which is closest to the interior point (30,40)
Leona [4187]

Response-

(78,104) represents the point closest to the interior.

Explanation-

The equation defining the circle,

\Rightarrow x^2+y^2 = 16900

\Rightarrow y^2 = 16900-x^2

\Rightarrow y = \sqrt{16900-x^2}

Since the point lies on the circle, its coordinates must be,

(x,\sqrt{16900-x^2})

The distance "d" from the point to (30,40) can be calculated as,

=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}

=\sqrt{(x-30)^2+(\sqrt{16900-x^2}-40)^2}

=\sqrt{x^2+900-60x+16900-x^2+1600-80\sqrt{16900-x^2}}

=\sqrt{9400-60x-80\sqrt{16900-x^2}}

Next, we need to determine the value of x for which d is minimized. The minimum distance occurs when 9400-60x-80\sqrt{16900-x^2} is at its lowest value.

Let’s set up the equation,

\Rightarrow f(x)=9400-60x-80\sqrt{16900-x^2}

\Rightarrow f'(x)=-60+80\dfrac{x}{\sqrt{16900-x^2}}

\Rightarrow f''(x)=\dfrac{1352000}{\left(16900-x^2\right)\sqrt{16900-x^2}}

We find the critical points,

\Rightarrow f'(x)=0

\Rightarrow-60+80\dfrac{x}{\sqrt{16900-x^2}}=0

\Rightarrow 80\dfrac{x}{\sqrt{16900-x^2}}=60

\Rightarrow 80x=60\sqrt{16900-x^2}

\Rightarrow 80^2x^2=60^2(16900-x^2)

\Rightarrow 6400x^2=3600(16900-x^2)

\Rightarrow \dfrac{16}{9}x^2=16900-x^2

\Rightarrow \dfrac{25}{9}x^2=16900

\Rightarrow x=\sqrt{\dfrac{16900\times 9}{25}}=78

\Rightarrow x=78

Then,

\Rightarrow f''(78)=\dfrac{1352000}{\left(16900-78^2\right)\sqrt{16900-78^2}}=\dfrac{125}{104}=1.2

Since f''(x) is positive, the function f(x) achieves its minimum at x=78

When x is set to 78, the corresponding y value will be

\Rightarrow y = \sqrt{16900-x^2}=\sqrt{16900-78^2}=104

This leads us to conclude that the closest point is (78,104)

5 0
8 days ago
Square T was translated by the rule (x + 2, y + 2) and then dilated from the origin by a scale factor of 3 to create square T″.
AnnZ [3900]

Answer: OPTION C.

Step-by-step explanation:

It is essential to consider the following:

Dilation:

  • A transformation where the image retains the same shape as the original but differs in size.
  • Dilation maintains the order of points.
  •  Measurements of angles remain unchanged.

Translation:

  • A transformation that keeps the image identical in size and shape to the original.
  • Translation preserves the ordering of points.
  • The angle measurements do not change.

Consequently, since Square T underwent translation followed by dilation to form Square T'', we conclude that the rationale explaining why they are similar is:

Translations and dilations maintain the order of points; thereby, the corresponding sides of squares T and T″ are proportional.

6 0
3 days ago
Read 2 more answers
If g(x)=4x^2-16 were shifted 5 units to the right and 2 down, what would the new equation be?
lawyer [4039]
Try this method:
When a graph shifts right, replace 'x' with 'x' minus the number.
When it shifts down, subtract the number from 'y'.
So the final equation becomes: y = 4(x - 5)² - 18.
The answer is A.
4 0
13 days ago
Read 2 more answers
A box has 14 camera of which 6 are refurbished and 8 are new. If four of these 14 cameras are selected at random without replace
Leona [4187]

Answer:

160/1001, 175/1001

Step-by-step explanation:

i) We calculate:

₈C₁ methods to select 1 new camera from a selection of 8

₆C₃ methods to select 3 refurbished cameras from a selection of 8

₁₄C₄ methods to select 4 cameras from the total of 14 cameras

The probability formula is:

P = ₈C₁ ₆C₃ / ₁₄C₄

P = 8×20 / 1001

P = 160 / 1001

P ≈ 0.160

ii) For at most one new camera, it means we want either one new camera or none at all. We've calculated the probability of selecting one new camera already. The probability of not selecting any new camera is equivalent to selecting 4 refurbished cameras:

P = ₆C₄ / ₁₄C₄

P = 15 / 1001

Therefore, the combined probability is:

P = 160/1001 + 15/1001

P = 175/1001

P ≈ 0.175

4 0
10 days ago
The Sears Tower, at 1,451 feet, is one of the tallest structures in the United States. A penny is thrown from the top of the tow
Leona [4187]

Answer:

The formula representing the penny's height as a function of time is:

h(t)=1451-16t^2

After 7 seconds, the height of the penny will reach 667 feet.

Step-by-step explanation:

The penny experiences free fall.

With an initial velocity of zero and an initial height of h(0)=1,451.

Gravity acts as the acceleration, measured as g=32 ft/s^2.

The model can be initiated by analyzing speed:

dv/dt=-g\\\\v(t)=v_0-gt=-gt

Then, the height is expressed as:

dh/dt=v(t)=-gt\\\\h(t)=h_0-\dfrac{gt^2}{2}=1451-\dfrac{32}{2}t^2\\\\\\h(t)=1451-16t^2

The height of the penny at approximately 7 seconds can be calculated as:

h(7)=1451-16(7^2)=1451-16*49=1451-784=667

After 7 seconds, the penny will stand at a height of 667 feet.

6 0
11 days ago
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