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True [87]
2 years ago
7

Whats the answer plesee and thank you!!!!

7D%20" id="TexFormula1" title=" \frac{4}{9} = {36}{n} " alt=" \frac{4}{9} = {36}{n} " align="absmiddle" class="latex-formula">
​

Mathematics
1 answer:
aivan3 [116]2 years ago
4 0
N=1/81 Look at the pic for more details and i got the pic from photomath

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A plane flew 360km in 3 hrs when flying with the wind.With no change in the wind,the return trip took 4 hrs.Find the speed of th
morpeh [17]
Speed of the plane: 250 mph
Speed of the wind: 50 mph
Explanation:
Let p = the speed of the plane
and w = the speed of the wind
It takes the plane 3 hours to go 600 miles when against the headwind and 2 hours to go 600 miles with the headwind. So we set up a system of equations.
600
m
i
3
h
r
=
p
−
w
600
m
i
2
h
r
=
p
+
w
Solving for the left sides we get:
200mph = p - w
300mph = p + w
Now solve for one variable in either equation. I'll solve for x in the first equation:
200mph = p - w
Add w to both sides:
p = 200mph + w
Now we can substitute the x that we found in the first equation into the second equation so we can solve for w:
300mph = (200mph + w) + w
Combine like terms:
300mph = 200mph + 2w
Subtract 200mph on both sides:
100mph = 2w
Divide by 2:
50mph = w
So the speed of the wind is 50mph.
Now plug the value we just found back in to either equation to find the speed of the plane, I'll plug it into the first equation:
200mph = p - 50mph
Add 50mph on both sides:
250mph = p
So the speed of the plane in still air is 250mph.
6 0
2 years ago
HELP ASAP WILL MARK BRAINIEST IF YOU ARE RIGHT !Which of the following represents a function?
gregori [183]

Answer:

Option C.

Step-by-step explanation:

This is a function because all of the numbers have a partner, and none of them have more than one.

                                    Example of Not a Function

Function                                Not a Function

-4 to 5                                      <em> -4 to 5</em>                             <

9 to 7                                       <em> -4 to 3    </em>                          <

13 to 3                                       13 to 3                              ^

-7 to 5                                        9 to 7                               ^

                                                 -7 to 5                               ^

                                           Not a Function because of this

8 0
3 years ago
Movie Ticket Sales : 6x + 9y = 1,500 Suppose on this day all tickets were on sale for the child price of $6. How many tickets we
dedylja [7]
The answer to the question

6 0
2 years ago
Read 2 more answers
Slope and y intercept y=7/4x-10
Andreas93 [3]

Hi there!

The slope is the number in front of x so it is 7/4 or 1 3/4

The y-intercept is the independent number in the equation, so it is -10

Your friend, ASIAX

7 0
3 years ago
Read 2 more answers
I need help? Can you please tell me
BaLLatris [955]

Answer:

whats the questun

Step-by-step explanation:

7 0
2 years ago
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