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dalvyx [7]
4 years ago
15

A plane flies 630 miles with the wind in the same time that it takes to fly 455 miles against the wind. If this plane flies at t

he rate of 270 mph in still air what is the speed of the wind
Mathematics
1 answer:
MatroZZZ [7]4 years ago
5 0
The speed of the windo is 217 mph in still air
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2.5h= min pls answer me quick pls​
Effectus [21]

Answer:

2.5h = 150 min.

Step-by-step explanation:

An hour is 60 minutes.

A half an hour is 30 minutes.

Two hours = 1 hour + 1 hour = 60 minutes + 60 minutes = 120 minutes

2.5 hours = 2 hours + 1/2 hour = 120 minutes + 30 minutes = 150 minutes

2.5h = 150 min.

Hope this helps.

6 0
3 years ago
Why is the letter i the square root of negative one ( <img src="https://tex.z-dn.net/?f=%5Csqrt%7B-1%7D" id="TexFormula1" title=
Alja [10]

Answer:

It is an imaginary number.

Step-by-step explanation:

The square root of negative one is "i," the imaginary number. This concept is immensely useful in mathematics, as it allows for there to be square roots of negative numbers, which is otherwise not possible using only real numbers.

Any number that includes a negative square root is called an imaginary number. For example, the square root of -9 equals 3i, an imaginary number. When an imaginary number and a real number are combined, for example 2 + 3i, this is called a complex number. Complex numbers have many real world applications, including manipulating sound waves and calculating electrical currents.

3 0
3 years ago
Tell me if I'm right, 10 points on the line
Llana [10]
<h3>Answer: Choice F) 1</h3>

=============================================

Explanation:

x^2+8x+7 factors to (x+1)(x+7)

x^2+4x-21 factors to (x-3)(x+7)

Therefore, the numerator (x^2+8x+7)(x-3) updates to (x+1)(x+7)(x-3)

The denominator (x^2+4x-21)(x+1) updates to (x-3)(x+7)(x+1)

We have three pairs of terms that will cancel between the numerator and denominator. The (x+1) terms pair up and cancel out, so do the (x+7) terms and also the (x-3) terms as well. Everything cancels out. The only thing left is 1 because x/x = 1 where x is nonzero. We can have a more complicated expression replace x to get the same basic idea. This is what I mean by "canceling".

5 0
4 years ago
Read 2 more answers
Please Help!!! 25 points!!!!
ASHA 777 [7]

Answer:

r = 3

Step-by-step explanation:

225 divided by 25 is 9 which is diameter

radius is half of the diameter which is 3

to find the radius you the formula of how to the volume of a cylinder then you flip it around.

Hopefully this helps you

3 0
3 years ago
Write each statement as an algebraic expression. The sum of a number c and its square.
Nikitich [7]
A sum means that two numbers are added together. A square means that a number is raised to the second power.

The sum of a number c and its square can be written with this algebraic expression:

c + c^{2}
3 0
3 years ago
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