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3 years ago

Solve for x x^2-3x+2=0

Mathematics

1 answer:

cricket20 [7]3 years ago

6 0

Answer:

x=1,2

Step-by-step explanation:

x^2-3x+2=0

(x-1)(x-2)

x-1=0

x-2=0

x=1,2

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2 years ago

Please help me!<br> Hint: the number is negative

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$-36$ goes into the box

Step-by-step explanation:

Let the number be $x$ , then

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2 years ago

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A source of laser light sends rays AB and AC toward two opposite walls of a hall. The light rays strike the walls at points B an

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Answer:

The distance between the walls is 70 m.

Step-by-step explanation:

Given: A source of laser light is at point A on the ground between two parallel walls BE and CD . The walls are perpendicular to the ground that is

BE ⊥ ED and CD ⊥ ED

AB is a ray of light which strikes the wall on the left at point B which is 30 meters above the ground. that is BE = 30 m

AC is a ray of light which strikes the wall on the right at point C. The length of AC = 80 meters.

The ray AB makes an angle of 45 degrees with the ground that is m∠BAE = 45°

The ray AC makes an angle of 60 degrees with the ground that is m∠CAD = 60°

As shown is figure attached below.

WE have to find the distance between the walls that is Length of ED

Length of ED = EA + AD

Consider the Δ AEB,

Using trigonometric ratio,

$\tan\theta=\frac{perpendicular}{base}$

Here $\theta=45^{\circ}$ , perpendicular = 30 m and base we can find.

thus,

$\tan 45^{\circ}=\frac{30}{EA}$

We know $\tan 45^{\circ}=1$

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Using trigonometric ratio,

$\cos\theta=\frac{base}{hypotenuse}$

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thus, Base = 40 m

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Thus, the distance between the walls that is the length of ED = 30 + 40 = 70 m

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2 years ago