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4 years ago

What is the solution to 2x^2 + x + 2 = 0

1 answer:

5 0

x=\frac{-2+2\sqrt{3}}{2},\frac{-2-2\sqrt{3}}{2}x=
2

−2+2√
3

,
2

−2−2√
3

2 Simplify solutions
x=-1+\sqrt{3},-1-\sqrt{3}x=−1+√
3

,−1−√
3

Done
Decimal Form: 0.732051, -2.732051

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4x - 3 = 2x + 7 Solve the folling

Arlecino [84]

Answer:

x=5

Step-by-step explanation:

4x-3=2x+7

2x-3=7

2x=10

x=5

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3 years ago

What is 2x - 3y X 2x - 3y

eimsori [14]

(2x-3y)(2x-3y)
4x^2 - 6xy - 6xy + 9y^2
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3 0

4 years ago

I need help on this ASAP

Dmitriy789 [7]

Answer:

B and D

Step-by-step explanation:

Distributive property on 3(c-3) is 3c-12=20. D is the same. Divide instead.

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3 years ago

Read 2 more answers

An observer on top of a 50-foot tall lighthouse sees a boat at a 7° angle of depression. To the nearest foot, how far is the boa

Yuri [45]

Answer:

407.22 foot is the boat from the base of the lighthouse

Step-by-step explanation:

Given the statement: An observer on top of a 50-foot tall lighthouse sees a boat at a 7° angle of depression.

Let x foot be the distance of the object(boat) from the base of the lighthouse

Angle of depression = $7^{\circ}$

$\angle CAB = \angle DCA = 7^{\circ}$ [Alternate angle]

In triangle CAB:

To find AB = x foot.

Using tangent ratio:

$\tan (\theta) = \frac{Opposite side}{Adjacent Base}$

$\tan (\angle CAB) = \frac{BC}{AB}$

Here, BC = 50 foot and $\angle CAB =7^{\circ}$

then;

$\tan (7^{\circ}) = \frac{50}{x}$

$x = \frac{50}{\tan 7^{\circ}}$

$x = \frac{50}{0.1227845609}$

Simplify:

AB = x = 407.217321 foot

Therefore, the boat from the base of the light house is, 407.22'

5 0

3 years ago

PLEASE HELP IM STUCK ON THIS QUESTION

oksian1 [2.3K]

THe answer is the second option because you have to use the pythogorean theorm to fing the 3rd side and multiply your answer by 2 to get the value of x.

3 0

3 years ago