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Ludmilka [50]
3 years ago
14

What is the answer to 7b-15=5b-3

Mathematics
2 answers:
Sidana [21]3 years ago
7 0
First you move -15 over which makes it 7b=5b+12
then you move 5b over so then its 2b=12
divide b=6
Harrizon [31]3 years ago
7 0
7b - 15 = 5b - 3
7b - 5b = -3 + 15
2b = 12
b = 6
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Give an example of an open equation​
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A cell phone provider classifies its customers as Low users (less than 400 minutesper month) or High users (400 or more minutes
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Answer:

a ) See step by step explanation

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Then:

if the user is low today  xt  (0)    we have the probability of 80% ( 0,8) of have the user in the same condition and 20% (0,2) of having him or her as high user

xt = 1      

If the user is high today xt (1) is high today we have the probability of 70% ( 0,7) of having  the user in the same condition and 30% (0,3) of having him or her as high user

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     High(1)  or H   0,3        0,7

The resulting equation system is:

xt  =  0,8* xt  +  0,2* xt+1

xt+1  = 0,3*xt + 0,7* xt+1

1  =  xt + xt+1

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xt  = 0,8*xt + ( 1 - xt ) * 0,2

xt - 0,8*xt = 0,2 - 0,2xt

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b)  If in January 0,5  ( 50%) of customesr were  low user

In february  teh % of low user customer wll be

xt  =  0,8* xt  +  0,2* xt+1

0,5 = 0,8*0,5 + 0,2*xt+1

0,5 = 0,4 + 0,2 *xt+1

0,1/0,2 = xt+1        xt+1 = 0,5       or   50%

The same answer for March

7 0
3 years ago
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