Ask question

Ask question

All categories

3 years ago

15

If a plane can travel 480 miles per hour with the wind and 400 miles per hour against the wind find the speed of the wind and th

e speed of the plane in still air.

1 answer:

pychu [463]3 years ago

7 0

he is going 80 mph because he can go 480 mph and the wind is against him 400 mph and 480-400=80

Hope this helps!

Please give brainliest

You might be interested in

If events A and B are independent, what must be true?A.) P(AB) = P(B)

anygoal [31]

Answer:

B.) P(A/B) = P(A)

Step-by-step explanation:

If two events, A and B are independent:

We have that:

$P(A \cap B) = P(A)P(B)$

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

Since they are independent:

$P(A \cap B) = P(A)P(B)$

Then

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{P(A)P(B)}{P(A)} = P(B)$

So

$P(B|A) = P(B)$ , or either:

$P(A|B) = P(A)$ , and thus, the correct answer is given by option B.

7 0

2 years ago

Factor completely 2x3 + x2 - 18x – 9.

lys-0071 [83]

$2x^3+x^2-18x-9=x^2(2x+1)-9(2x+1)\\\\=(2x+1)(x^2-9)=(2x+1)(x^2-3^2)\\\\=(2x+1)(x-3)(x+3)$

6 0

3 years ago

Read 2 more answers

In how many different ways can five children hold hands to play "Ring Around the Rosy"?

mote1985 [20]

Answer:

Step-by-step explanation:

25

7 0

3 years ago

Read 2 more answers

Suppose a normal distribution has a mean of 48 and a standard deviation of 2. What is the probability that a data value is betwe

worty [1.4K]

Answer:

c 16.0%

Step-by-step explanation:

8 0

3 years ago

You invested $6,500 in an account that pays 6 percent simple interest. how much more could you have earned over a 10-year period

Klio2033 [76]

6500(1.06^10)-10(6500*.06)+6500=$1240.51

6 0

3 years ago