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pav-90 [236]
3 years ago
13

35 POINTS

Mathematics
1 answer:
miv72 [106K]3 years ago
4 0

Answer:

65

Step-by-step explanation:

520/8=65 so approximately 65 kids play soccer

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Given y= 2x squared - 10x find all the real values of x for which y = -3
Thepotemich [5.8K]
y=2 x^{2} -10x \\ -3=2 x^{2} -10x \\ 2 x^{2} -10x+3=0 \\ x=\frac{-b \pm \sqrt{ b^{2} -4ac} }{2a}, \ where \ a=2, \ b=-10, \ c=3
Therefore,
x=\frac{-(-10) \pm \sqrt{ (-10)^{2} -(4 \times 2 \times 3)} }{2 
\times 2} \\ =\frac{10 \pm \sqrt{ 100 -24} }{4} \\ =\frac{10 \pm \sqrt{ 
76} }{4} \\= \frac{10 + \sqrt{ 76} }{4}  \ or \ \frac{10 - \sqrt{ 76} 
}{4}  \\ =4.679 \ or \ 0.3206


8 0
2 years ago
If a coin is flipped 4 times what is the probability that a coin will land on heads 4 times
sdas [7]
(1/2)(1/2)(1/2)(1/2)= 1/16 or 6.25%
7 0
2 years ago
A ball of radius 17 has a round hole of radius 7 drilled through its center. Find the volume of the resulting solid.
Ahat [919]

Answer:

<h3>19,133.067</h3>

Step-by-step explanation:

Volume of the ball (spherical in nature) Vb = 4/3πrb³

Volume of the hole Vh = 4/3πrh³

rb is the radius of the ball

rh is the radius of the hole

If a ball of radius 17 has a round hole of radius 7 drilled through its center, the volume of the resulting solid will be expressed as:

V = Vb - Vh

V = 4/3πrb³ - 4/3πrh³

factor out the like terms;

V = 4/3π(rb³-rh³)

Given

rb = 17

rh = 7

V = 4/3π(17³-7³)

V = 4/3π(4913-343)

V = 4/3π(4570)

V = (4π*4570)/3

V = 57,399.2/3

V = 19,133.067

Hence the volume of the resulting solid is 19,133.067

6 0
2 years ago
18 - 2q = 4 this is two step equasions it's skills practice &amp; I'm not sure how to do it
klio [65]

Answer:

q = 7

Step-by-step explanation:

Given

18 - 2q = 4 ( Isolate the term in q by subtracting 18 from both sides )

- 2q = - 14 ( divide both sides by - 2 )

q = \frac{-14}{-2} = 7

6 0
3 years ago
Read 2 more answers
Mr. williams physical education class lasts 7/8 hour. Instructions are 1/5 of that time, how many minutes are NOT spent on instr
melomori [17]
37/40 but you should probably wait for a second opinion because i bad at math
6 0
3 years ago
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