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2 years ago

What equation results from completing the square and factoring x2+2×=9

Mathematics

1 answer:

Arturiano [62]2 years ago

5 0

The answer should be A. If you need work I can show you.

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PLZ ANSWER WILL MARK BRAINLIST 3O POINTS!!!!! How do you calculate the residuals for a scatterplot?

Vikki [24]

Answer:

So, to find the residual I would subtract the predicted value from the measured value so for x-value 1 the residual would be 2 - 2.6 = -0.6.

Step-by-step explanation:

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2 years ago

How many times does six go into 344

marshall27 [118]

The answer is 57 times

8 0

3 years ago

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Prove that:

devlian [24]

Answer:

Identities used:

1/cosθ = secθ
1/sinθ = cosecθ
sinθ/cosθ = tanθ
cosθ/sinθ = cotθ
sin²θ + cos²θ = 1

<h3>Question 1 </h3>

(1 - sinθ)/(1 + sinθ) =
(1 - sinθ)(1 - sinθ) / (1 - sinθ)(1 + sinθ) =
(1 - sinθ)² / (1 - sin²θ) =
(1 - sinθ)² / cos²θ

Square root of it is:

(1 - sinθ)/ cosθ =
1/cosθ - sinθ / cosθ =
secθ - tanθ

<h3>Question 2 </h3>

The first part without root:

(1 + cosθ) / (1 - cosθ) =
(1 + cosθ)(1 + cosθ) / (1 - cosθ)(1 + cosθ)
(1 + cosθ)² / (1 - cos²θ) =
(1 + cosθ)² / sin²θ

Its square root is:

(1 + cosθ) / sinθ =
1/sinθ + cosθ/sinθ =
cosecθ + cotθ

The second part without root:

(1 - cosθ) / (1 + cosθ) =
(1 - cosθ)²/ (1 + cosθ)(1 - cosθ) =
(1 - cosθ)²/ (1 - cos²θ) =
(1 - cosθ)²/sin²θ

Its square root is:

(1 - cosθ) / sinθ =
1/sinθ - cosθ / sinθ =
cosecθ - cotθ

Sum of the results:

cosecθ + cotθ + cosecθ - cotθ =
2cosecθ

4 0

2 years ago

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Given that a randomly chosen quadrilateral has four right angles, what is the probability that the quadrilateral also has four e

Alexxx [7]

Answer:

0.25

Step-by-step explanation:

This is the question on conditional probability

Let A - the quadrilateral has four right angles

B - the quadrilateral has four equal side lengths

Required probability = P(B/A)

By definition of continuous probability

$P(B/A) = \frac{P(AB)}{P(A)}$

$P(AB) = \frac{2}{20} =0.10$

P(A) = $\frac{8}{20} =0.4$

Hence given probability = $\frac{0.1}{0.4} =0.25$

7 0

2 years ago

Answer needed quick is it supplementary vertical complementary adjacent

Archy [21]

Hey!!

They are adjacent angles.

Both angles have common side and vertex.

Hope it will help u...

8 0

3 years ago

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