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vitfil [10]
3 years ago
8

Pls help me guys! I suck at math

Mathematics
1 answer:
wariber [46]3 years ago
7 0
32-x  since she played 32 games. X would be the amount she won. 32- amount she won = amount she loss. 
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Which expression is equivalent to the following?
xeze [42]

Step-by-step explanation:

\sin^{4}x  \:  -  \cos^{4} x = (\sin^{2}x)^{2}  - (\cos^{2}x)^{2}

= (\sin^{2}x)^{2}  - (1 - \sin^{2}x)^{2}

= \sin^{4}x - (1 - 2\sin^{2}x + \sin^{4}x)

= 2\sin^{2}x - 1

=  - \cos2x

Note: I used the identity

{ \sin }^{2} x =  \frac{1}{2} (1 -  \cos \: 2x)

for the last step.

PS. I love proving trigonometric identities!

3 0
3 years ago
Write an equation fo the line that passrs through (4,-5) and (3,-2)
kap26 [50]
D is the correct answer luv
7 0
3 years ago
.Ace! Professional tennis player Rafael Nadal hits the ball extremely hard. His first-serve speeds follow a Normal distribution
Stels [109]
P(Y > 121) = 1 - P(Y < 121) = 1 - P(z < (121 - 115)/6) = 1 - P(z < 1) = 1 - 0.84134 = 0.15866

P(Y ≤ c) = 0.15
P(Y ≤ c) = 1 - 0.85
P(Y ≤ c) = 1 - P(z ≤ 1.0365)
P(Y ≤ c) = P(z ≤ -1.0365)
Thus, (c - 115) / 6 = -1.0365
c - 115 = -6.219
c = -6.219 + 115
c = 108.781
8 0
3 years ago
A box is with a square base and open top is to be constructed and a total volume of 720 cubic inches is required. The cost of ma
katen-ka-za [31]

Answer:

  total cost = 8x^2 +17280/x

Step-by-step explanation:

Let x represent the base length. Then the area of the base is x^2, and the height is h = 720/x^2.

The area of the four sides is ...

  (4x)(h) = (4x)(720/x^2) = 2880/x

The cost of the base is ...

  base cost = 8x^2

And the cost of the sides is ...

  side cost = 6(2880)/x = 17280/x

The total cost of the box is ...

  total cost = base cost + side cost

  total cost = 8x^2 +17280/x

_____

<em>Comment on the cost function</em>

You will find this function has a minimum at x=∛1080 ≈ 10.260 in. The total cost is about $2526.35, and the box is 2/3 times as tall as wide. That aspect ratio makes any pair of opposite sides cost the same as the base, the generic solution to a cost optimization problem of this sort.

7 0
3 years ago
True or False: The following sequence of numbers is an arithmetic sequence.
slava [35]

Answer:

False

Step-by-step explanation:

3 0
3 years ago
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