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PilotLPTM [1.2K]
3 years ago
6

(4) Check my work please?

Mathematics
1 answer:
lawyer [7]3 years ago
7 0
You have the correct x and y values. Nice work.

x/3 = 3/4
x*4 = 3*3
4x = 9
x = 9/4

AC = AD+DC
AC = 4+x
AC = 4+9/4
AC = 16/4 + 9/4
AC = 25/4

AB^2 + BC^2 = AC^2
5^2 + y^2 = (25/4)^2
25 + y^2 = 625/16
y^2 = 625/16 - 25
y^2 = 625/16 - 400/16
y^2 = 225/16
y = sqrt(225/16)
y = 15/4
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From the identity \displaystyle{ \tan x= \frac{\sin x}{\cos x}, and from the values:

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we have: \displaystyle{ \tan 45^{\circ}= \frac{\sin 45^{\circ}}{\cos 45^{\circ}}= \frac{ \frac{ \sqrt{2}}{2}}{\frac{ \sqrt{2}}{2}} =1.


We also know that \sin30^{\circ}= \frac{1}{2}.


Thus, \displaystyle{  \frac{\tan 45^{\circ}}{\sin30^{\circ}} = \frac{1}{\frac{1}{2}}=2.



Answer: 2
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3 years ago
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4. A statistician working for the National Basketball Association supplies the television announcers with interesting statistics
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3 years ago
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Answer:

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<em>0.12 = Speed of water being pumped -6.8  </em>

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8 0
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