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vodomira [7]
4 years ago
8

Please answer this question !! 20 points and brainliest !! Thank u !!

Mathematics
2 answers:
Ostrovityanka [42]4 years ago
5 0

Answer:

Step-by-step explanation:

The system of equations (a) is the correct one for this situation.  We must now solve this system for x and y, which are the unit costs.

Multiplying the 2nd equation by (-3/2) yields -12x - 18y = -168.

Now eliminate x by combining the two equations

12x + 5 y = 116

-12x  -18y  = - 168

-------------------------

         -13y = -52, or y = 4.

If y = 4 then 12x + 5y = 116, or

                    12x  +5(4) = 116, or

                     12x  +  20  =  116, or

                      12x       = 96, or x = 8

Roller pens are $8/dozen and ball point pens are $4 per dozen.

Nataliya [291]4 years ago
4 0

I think it’s A:

Cause it is what it is

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6

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3 years ago
Can someone Help me ASAP plss!!
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tino4ka555 [31]

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4 years ago
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2. In two tosses of a fair die, what is the probability that:
zaharov [31]

Answer:

Step-by-step explanation:

The outcomes table is shown in the attached diagram. From the table, the total number of outcomes is 36.

i) the number of outcomes whose sum is 7 are 6 (1,6 2,5 3,4 4,3 5,2 6,1)

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3) this is a poisson distribution. We want to determine the mean.

Mean = np

p = 5/200 = 0.025

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Therefore,

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6 0
3 years ago
A battery is 10% charged and is charging at a constant rate. The graph shows the battery’s charge over time. What is the slope o
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