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Brums [2.3K]
3 years ago
9

Someone please help me with number 4

Mathematics
1 answer:
stiks02 [169]3 years ago
6 0

Answer:

the answer should be 36

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at joe's cafe 1 cup of coffee and 3 donuts is $4.10 and 2 cups of coffee and 2 donuts is $4.60, how much is 1 count? 1 cup of co
gtnhenbr [62]
C + 3d = 4.10.....multiply by -2
2c + 2d = 4.60
----------------
-2c - 6d = - 8.20 (result of multiplying by -2)
2c + 2d = 4.60
-----------------add
     -4d = - 3.60
        d = -3.60 / -4
        d = 0.90 <==== cost of 1 doughnut

c + 3d = 4.10
c + 3(0.90) = 4.10
c + 2.70 = 4.10
c = 4.10 - 2.70
c = 1.40 <==== cost of 1 coffee
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4 years ago
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6.- Find the area under the standard normal distribution: to the left of z=-1.55.
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Answer:

P(z

Step-by-step explanation:

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