Help!!!?

How do i find the distance and airplane travels if it goes 400 miles per hour for 3 hours ?

Alexus [3.1K]

400 miles per hour is a rate. For every hour, the airplane travels four hundred miles.
Knowing this, If the plane travels for three hours, we use a simple multiplication equation to represent this problem.
400 x 3 = 1200
The plane traveled 1200 miles, if it traveled at a speed of four hundred miles for three hours.

8 0

4 years ago

Read 2 more answers

Please help your smart right<br>

jeka94

Answer:

No

Yes

No

Step-by-step explanation:

I hope this helps

3 0

3 years ago

Read 2 more answers

0.2124 divided by 0.06

Strike441 [17]

Answer:

3.54

Step-by-step explanation:

move the decimal place over two making the numbers 6 and 21.24

6 goes into 21 3 times with a remainder of 3 (carry it down)

6 goes into 32 5 times with a remainder of 2 (carry it down)

6 goes into 24 4 times with no remainders

put the numbers together and don't forget the decimal

that number is 3.54

(I was trying to explain long division in words and boy is it difficult)

5 0

3 years ago

Mathematical symbols are critical to the discipline of statistics. A symbol can help identify which distribution and what type o

Shtirlitz [24]

Answer: sigma is used for measuring Population Standard Deviation.

Step-by-step explanation:

The lower case Greek letter 'sigma' is denoted by the symbol ( $\sigma$ ).

This symbol indicates the Population Standard Deviation of the data. Standard deviation means how much variation or dispersion is there in our data. Squaring of standard deviation gives us Variance which is denoted by the symbol $\sigma ^{2}$ .

Formula for Population Standard deviation ( $\sigma$ ) is = $\sqrt{\frac{\sum (x_i-\mu )^{2}}{N}}$ ,

where $x_i$ = each value from our list of data

$\mu$ = Population mean of data

N = Number of observations in our data

Standard deviation can never be negative and it is very much sensitive to outliers in our data.

8 0

3 years ago

PLEASE ANSWER ASAP!!! SHOW ALL THE STEPS.

fenix001 [56]

Answer:

For the first question $x = 4\\ y = -1$ and

For the second question $x = 0.5\\ y = -1$

Step-by-step explanation:

Given:

1.

x - 3y = 7

3x + 3y = 9

2.

8x+ 3y = 1

4x + 2y = 0

Elimination method :

In the elimination method we need to make the coefficient of x or the coefficient of y same in both the equation so by adding or subtracting we can eliminate the x term or the y term.

Then substitute that values which you will get on eliminating in any equation you will get the corresponding value.

For the first question, the y coefficient is same hence by adding both the equation we can eliminate 3y term. so on solving we get

$(x - 3y) + (3x + 3y) = 7 + 9\\4x = 16\\x = \frac{16}{4}\\x = 4$

Now substitute X equal to 4 in equation x -3y = 7 we get

$4 - 3y = 7\\-3y = 7 - 4\\-3y = 3\\y = \frac{3}{-3}\\ y = -1\\$

This way we have x is equal to 4 and y is equal to -1 for question number 1.

For the second question, we will make X coefficient same in the second equation that is multiplying by 2 to the equation 4x + 2y = 0 then we get

$8x + 4y = 0\\$

Now the coefficient of x term become same now we will subtract the two equations that is 8x + 3y = 1 and 8x + 4y =0 we get

$(8x + 3y) - (8x + 4y) = 1 - 0\\3y - 4y = 1\\ -y = 1\\y = -1$

Now substitute y equal to -1 in equation 8x +3y = 1 we get

$8x + 3\times -1 = 1\\8x - 3 = 1\\8x = 1 + 3\\8x = 4\\x = \frac{4}{8}\\ x = 0.5\\$

This way we have x is equal to 0.5 and y is equal to -1 for question number 2.

3 0

3 years ago