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Yuliya22 [10]
3 years ago
13

How many solutions is x + 5y = 0 and 25y = -5 (13 points for answer) Please help :(

Mathematics
1 answer:
dybincka [34]3 years ago
7 0

Answer:

for x+5y+0 the answer is  -5y and for 25y=-5 the answer is  -1/5

Step-by-step explanation:

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Verify the pythagorean identity 1 + c o t ^2 θ = c s c ^2 θ
Grace [21]

Answer: The identity is verified. See the explanation.

Step-by-step explanation:

You must keep on mind the following identities:

csc\theta=\frac{cos\theta}{sin\theta}\\\\csc\theta=\frac{1}{sin\theta}\\\\sin^2\theta+cos^2\theta=1

Therefore, by substitution, you can rewrite the identity as shown below:

1+cot^2\theta=csc^2\theta\\\\1+\frac{cos^2\theta}{sin^2\theta}=csc^2\theta

Simpliying, you obtain:

\frac{sin^2\theta+cos^2\theta}{sin^2\theta}=csc^2\theta\\\\\frac{1}{sin^2\theta}=csc^2\theta\\\\csc^2\theta=csc^2\theta

The identity is verified.

6 0
3 years ago
En un día de temporal de lluvia el meteorólogo dijo en las noticias que la probabilidad de que lloviera ese día era del 70%. ¿Qu
drek231 [11]

Answer:

Vamos a definir:

100% probabilidad de lluvia = Es seguro que ese día va a llover.

0% probabilidad de lluvia = Es seguro que ese día no va a llover.

Ahora, los valores intermedios admiten una dualidad, es decir, es posible que llueva o que no.

Particularmente en el caso del 70% significa que:

Si tenemos un dado de 10 caras, con los números {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

Y lo tiráramos, los resultados {1, 2, 3, 4, 5, 6, 7} indicarían que llueve.

Los resultados {8, 9, 10} indicarían que no llueve.

Entonces es mas probable que llueva, pero la probabilidad de que no llueva no es despreciable.

5 0
3 years ago
Perchlorate is a chemical used in rocket fuel. People who live near a former rocket-testing site are concerned that perchlorate
ser-zykov [4K]

Answer:

H_1 : \mu  > 24.5

Step-by-step explanation:

From the given information:

The sample size is 28

The population mean is 24.5 (ppb)

The sample mean is 225.3 (ppb)

Thus, the null and the alternative hypothesis can be computed as:

Null hypothesis:

H_o : \mu \le 24.5

Alternative hypothesis:

H_1 : \mu  > 24.5

8 0
3 years ago
Model -5 + (-6) on the number line
Arisa [49]

Answer:

-5+(-6 )= -11 so you would pinpoint -11 on the number line

Step-by-step explanation:

6 0
3 years ago
Find the number that makes the ratio equivalent to 3:9. 9:?
sesenic [268]

Answer:

27

Step-by-step explanation:

Given the ratio 3 : 9

and 9 : ?

note that 3 × 3 = 9, thus 9 × 3 = 27

3 : 9 = 9 : 27

5 0
3 years ago
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