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elena55 [62]
3 years ago
13

You need to fill a football with air to play with it. You know that your pump expels air at speed of 8.2 ft/s. The needle of you

r pump has a radius of 4.5 millimeters. What is the volume flow rate of the air being pumped into the football?
Mathematics
1 answer:
abruzzese [7]3 years ago
8 0
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7) Solve the following system of equations below algebraically using substitution.
Pani-rosa [81]

Answer:

x = 3.25

y =4.75

Step-by-step explanation:

In order to Solve the following system of equations below algebraically using substitution method we say that;

let;

8x - 4y = 7 ..................... equation 1

x + y = 8.......................... equation 2

from equation2

x + y = 8.......................... equation 2

x = 8 - y.............................. equation 3

substitute for x in equation 1

8x - 4y = 7 ..................... equation 1

8(8-y) - 4y = 7

64-8y-4y=7

64-12y=7

collect the like terms

64-7 = 12y

57= 12y

divide both sides by the coefficient of y which is 12

57/12 = 12y/12

4.75 = y

y =4.75

put y = 4.75 in equation 3

x = 8 - y.............................. equation 3

x = 8 -4.75

x = 3.25

to check if your answer is correct, put the value of x and y in either equation 1 or 2

from equation 2

x + y = 8.......................... equation 2

3.25 + 4.75 =8

8=8.................... proved

8 0
3 years ago
After 273 m3 of ethylene oxide is formed at 748 kPa and 525 K, the gas is cooled at constant volume to 293 K.The new pressure is
Anuta_ua [19.1K]
P1/T1 = P2/T2 

<span>748 / 525 = P2/293 </span>

<span>P2 = 748/525 X 293 = 417.455 kPa </span>
5 0
3 years ago
Read 2 more answers
There were some gumballs in a bag. Mrs. Roxas
Mekhanik [1.2K]

Step-by-step explanation:

6 \times  \frac{3}{2}  \times  \frac{4}{1}  = 36

7 0
2 years ago
Which of the graphs below represents the equation 8x − y = -4?
Akimi4 [234]

Answer:

8x-y+4=0

Step-by-step explanation:

because 8x-y+4=-4+4

8 0
3 years ago
YALLLLL PLEASE HELP MEEEEEEEEEEEEEEE I WIIIL MAKR BRANLIEST IF CORRECT!!!!!!!!
Minchanka [31]

Answer:

y=5x-3

Step-by-step explanation:

it just is

4 0
3 years ago
Read 2 more answers
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