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Westkost [7]
3 years ago
7

CAN SOMEONE PLEASE HELP ME WITH THESE 3 MATH QUESTIONS. I NEED HELP QUICK AND FAST. ONLY COMMENT IF YOU ARE HELPING THANKS! PLEA

SE ANSWER ALL 3!!

Mathematics
2 answers:
KiRa [710]3 years ago
6 0
Pg 1**
33 boys tried out and 12 girls tried out. 
87 boys didnt try out and 68 girls didnt try out.

pg 2**
18

dusya [7]3 years ago
3 0
Yes: girls=12, boys=33 No: girls=68 boys=87
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Write the standard equation for the circle
saw5 [17]

Answer:

The standard form of a circle's equation is (x-h)² + (y-k)² = r² where (h,k) is the center and r is the radius.

Step-by-step explanation:

3 0
2 years ago
One frame of a film in a projector is about 50 mm high. The film isOne frame of a film in a projector is about 50 mm high. The f
OlgaM077 [116]
The frame of film is actually 50 mm high, but it looks 16 m high on the screen.

Remember that 1 m = 1,000 mm.

So everything looks (16,000)/(50) = <u>320 times</u> as big on the screen
as it is on the film. That's called the scale factor.

The penguin is 35 mm high on the film. He'll look 320 times bigger on the screen.

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4 0
3 years ago
This question relates to concepts covered in Lectures 1 &amp; 2. You can use any of the excel files posted to work through the q
liubo4ka [24]

Answer:

mean of this demand distribution = 100

Step-by-step explanation:

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Mean = Expected vale = E[x]

for discrete provability function,

we say E[x] = ∑(x.p(x))

x     p(x)     x.p(x)

10     0.1     1

30    0.4    12

60    0.4    24

90    0.7    63

∴ ∑(x.p(x)) = ( 1 + 12 + 24 + 63 )

∑(x.p(x)) = 100

7 0
3 years ago
An irregular polygon is shown below: Image of irregular polygon with length of 7 units and height of 3 units labeled on left sid
torisob [31]
I don’t see the image can you please add one to the comments so I can answer it. Thanks
7 0
3 years ago
at maximum speed, an airplane travels 1720 miles against th wind in 5 hours. Flying with the wind, the plane can travel the same
iragen [17]

Answer:

x = 387

Step-by-step explanation:

The wind acts in the opposite direction to the plane when the time is longer.

The wind acts in the same direction as the plane when the time is shorter.

Equation

d = r*t

Givens

  • d = 1720
  • x = plane's speed
  • y = wind speed
  • t1 = 5 hours
  • t2 = 4 hours.

Substitution

  • d = (x + y) * t
  • 1720 = (x + y) * 4
  • 1720 = (x - y) * 5

Since the two distances are the same, you can equate the right hand sides.

  • (x + y) * 4 = (x - y)*5              Remove the brackets.
  • 4x + 4y = 5x - 5y                  Add 5y to both sides
  • 4x + 4y + 5y = 5x - 5y + 5y  Combine all the terms.
  • 4x + 9y = 5x                          Subtract 4x from both sides
  • 9y + 4x - 4x = 5x - 4x           Combine
  • 9y = x

Now use one of the given equations with the distance

  • 1720 = (x + y)*4           Substitute 9y for x
  • 1720 = (9y + y) *  4      Combine
  • 1720 = 10y * 4             Multiply the right
  • 1720 = 40y                  Divide by 40
  • 1720/40 = 40y/40      Do the division
  • 43 = y                          y = wind speek
  • 9y = x                          x = 9*y  
  • 9*43 = x
  • x = 387 miles per hour.
4 0
4 years ago
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