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3 years ago

A swimming pool has an area of 2x² + 5x - 12. If the width of the swimming

Mathematics

1 answer:

Delicious77 [7]3 years ago

8 0

Answer:

2x - 3

Step-by-step explanation:

The are of a rectangle is computed using the formula:

A = L x W

The area given is:

2x² + 5x -12

So:

2x² + 5x -12 = L x (x + 4)

$L=\dfrac{2x^{2}+5x-12}{x+4}\\\\$

So we can solve this through division:

2x - 3

x + 4 | 2x² + 5x - 12

- 2x² + 8x

-3x - 12

- -3x - 12

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Sin^2A+cos^2A=? .find the value.

d1i1m1o1n [39]

Answer:

Step-by-step explanation:

it is an identity. hope it helps

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3 years ago

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KiRa [710]

Step-by-step explanation:

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3 years ago

consider the equation is Y equals 1/square root of x and y=x-2. approximate solution of the system equations

emmasim [6.3K]

Answer:

$x=1$ and $x=4$

Step-by-step explanation:

We have the following system of equations:

$y=\sqrt{x}$ and $y=x-2$

To solve the problem, we need to equal the two equations:

$x-2=\sqrt{x}$ ⇒ $(x-2)^{2} =x$ ⇒ $x^{2} -4x + 4 = x$

⇒ $x^{2} -5x + 4 = 0$

So you need to find two numbers that added equal to 5 and multiplied equal to 4. These two numbers are $x=-1$ and $x=-4$ .

Then, the factorized form of the polynomial is: $(x-1)(x-4)$ .

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3 years ago

Assume that when adults with smartphones are randomly selected, 57% use them in meetings or classes. If 8 adult smartphone use

vovikov84 [41]

Answer:

≈ 0.2526

Step-by-step explanation:

The number of combinations of 4 out of 8:

8C4 = 8!/(4!(8-4)!)= 8*7*6*5/(1*2*3*4)= 70

Success factor is:

57% = 0.57

and failure factor is:

(100 - 57)%= 43%= 0.43

Probability:

0.57⁴*0.43⁴*70 ≈ 0.2526

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3 years ago

Identify the following equations as linear, quadratic or other. x + 3x2 = 0

aleksley [76]

Answer: Quadratic

Solution
X=0
X=- 1/3

6 0

3 years ago