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g100num [7]
3 years ago
15

Which of the following relations shows a function?

Mathematics
1 answer:
Kaylis [27]3 years ago
4 0

I believe it should be A

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A small planes flies 600 miles against the wind.in 3 hours. The return trip with the wind takes 2
suter [353]

Answer:

Speed of the plane: 250 mph

Speed of the wind: 50 mph

Step-by-step explanation:

Let x be the speed of the plane.

Let y be the speed of the wind

#Given that It takes the plane 3 hours to go 600 miles when against the headwind and 2 hours to go 600 miles with the headwind. We set our equations as:

\frac{600mi}{3hr}=x-y\\\\\frac{600mi}{2hr}=x+y\\\\\\200mph=x-y\ \ \  \ \ \ ...i\\\\300mph=x+y\ \ \ \  \ \ \ ...ii\\\\\therefore\ x=200\ mph+y\\\\\#Substitute \ in \ ii\\\\300\ mph=200\ mph+y+y\\\\y=50\ mph\\\\\\x=200\ mph+50\ mph

Hence, the speed of wind is 50 mph and the speed of the plane is 250 mph.

5 0
3 years ago
8.75 in<br> 2.4 in<br> 2.4 in<br> 8.75 in<br> Find the perimeter of the rectangle
Lapatulllka [165]
All you need to do is add them all together and the answer is 22.3 :)
8 0
4 years ago
A total of 553 tickets were sold for the school play. They were either adult tickets or student tickets. There were 53 more stud
larisa [96]

Answer:

250

Step-by-step explanation:

Let x = the number of adult tickets sold

Let x + 53= the number of student tickets sold

x + x + 53 = 553

2x = 500

x = 250

2x + 53 = 553

8 0
3 years ago
Read 2 more answers
What is the slope of the line 3x – 9y = 4? –3 –negative StartFraction one-third EndFraction StartFraction one-third EndFraction
Arturiano [62]

Answer:

1/3

Step-by-step explanation:

3x – 9y = 4

We need to solve for y

Subtract 3x from each side

3x – 9y-3x = 4-3x

-9y = -3x+4

Divide each side by -9

-9y/-9 = -3x/-9 +4/-9

y = 1/3 x -4/9

This is in the form y = mx+b  where m is the slope and b is the y intercept

y =1/3x -4/9

The slope is 1/3

6 0
3 years ago
Read 2 more answers
Step 2: Construct
vodomira [7]

Answer:

Refer to the Attachment

8 0
3 years ago
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