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PilotLPTM [1.2K]
3 years ago
8

A jar contains 18 gold coins, 36 rose gold coins, 9 silver coins, and 27 copper coins. What is the probability of randomly selec

ting a copper coin from the jar?
Mathematics
1 answer:
nignag [31]3 years ago
5 0
The answer 63% I worked it out
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Solve this system of linear equations. Separate the x and the y values with a comma.
ohaa [14]
4x = -60 - 19y
-7x = -48 - 19y

Subtract the bottom equation from the top:
4x + 7x = -60 + 48 - 19y + 19y

Simplify:

11x = -12 -0y
11x = -12

Divide both sides by 11:
11x/11 = -12/11

Simplify:
x = -12/11
Then plug in x to solve for y: 4(-12/11) = -60 - 19y

Simplify: -48/11 = -60 - 19y

Add 60 to both sides (keep in mind 60 = 660/11):

-48/11 + 660/11 = -60 + 60 - 19y

Simplify:
612/11 = 0 - 19y
612/11 = -19y

Divide both sides by -19 (keep in mind that dividing by -19 is the same as multiplying by -1/19):
612/11 • -1/19 = -19y/-19

Simplify:
-612/209 = y
y = -612/209

So, the answer is: (-12/11, -612/209)
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3 years ago
If 8y-8=24 find the value of 2y
Aloiza [94]

Answer:

8

Step-by-step explanation:

8y-8=24

+8 +8

8y=32

32/8 = 4

y=4

4*2=8

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What is xy=16 what kind of conic section is it?
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That is a hyperbola that is slanted

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Ratios, 
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1. 196 to 7=28.14
2.65 out of 105=1.61
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What is the rate for 162 water bottles in 9 cases
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You have to multiply 162 times 9 which equals 968
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4 years ago
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