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MakcuM [25]
3 years ago
8

I need help... Can someone help. If x equals 7, what does y equal? x = 7 y = ? 6x = 7y

Mathematics
1 answer:
klemol [59]3 years ago
8 0
Y=6. you would replace x with 7 in the equation.
6(7) = 7y
42=7y
6=y
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The proportion of students who own a cell phone on college campuses across the country has increased tremendously over the past
galina1969 [7]

Complete Question

The complete question is shown on the uploaded image  

Answer:

1 ) The correct option B

2) The correct option is  C

3)  The correct option is  C

4)  The correct option is  C

Step-by-step explanation:

From the question we are told that

   The proportion that own a cell phone  is  p = 0.90

    The  sample  size is  n =  15

Generally the appropriate distribution for X is mathematically  represented as

      X  \ is  \ B( n , p )

So  

       X  \ is  \ B( 15 , 0.90 )

Generally the number students that  own a cell phone in a simple random sample of 15 students is mathematically represented as

              \mu  =  n  *  p

              \mu  =  15 *  0.90

              \mu  =   13.5

Generally the standard deviation of the number of students who own a cell phone in a simple random sample of 15 students is mathematically represented as

                \sigma  =  \sqrt{ n *  p *  q }

Where  q is mathematically evaluated as

          q =  1- p

           q =  1- 0.90

           q =  0.10

            \sigma  =  \sqrt{ 15 *  0.90 *  0.10 }

            \sigma  = 1.16

Generally the probability that all students in a simple random sample of 15 students own a cell phone is mathematically represented as

   P(X =  15) =  \left 15} \atop {}} \right.C_{15} *  p^{15} *  q^{15 - 15}    

     P(X =  15) =  \left 15} \atop {}} \right.C_{15} *  (0.90)^{15} *  (0.10 )^{15 - 15}

From the combination calculator  is      \left 15} \atop {}} \right.C_{15} =  1

     P(X =  15) = 1 *  0.205891 *  1

      P(X =  15) = 0.206

7 0
3 years ago
X + y = 10<br> x - y = 2
lys-0071 [83]

Answer:

x=6

y=4

Step-by-step explanation:

just find the number that will match or u could just plug in one of those number and find other number

4 0
2 years ago
Read 2 more answers
If there are three noncollinear points there is always one plane?
guajiro [1.7K]

Answer:

Yes I believe there is.

Step-by-step explanation:

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4 0
3 years ago
PLEASE HELP THANK YOUUUUU
katrin [286]

Answer:

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Which expression is equal to 15x - 6
Keith_Richards [23]
15x-6=-90
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