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Norma-Jean [14]
3 years ago
6

What is the value of y in the solution to the system of equations? x + y = 1 2x – 3y = –30

Mathematics
2 answers:
arsen [322]3 years ago
8 0
X=10 y=20 Good Luck :)

Sauron [17]3 years ago
7 0
X + y = 1.....multiply by -2
2x - 3y = -30
-----------------
-2x - 2y = -2 (result of multiplying by -2)
2x - 3y = -30
----------------add
-5y = -32
y = -32/-5
y = 32/5 or 6.4 <===

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Pro tip: Include the actual question
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The monthly cost will be $17.14

Step-by-step explanation:

Given that the monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes) then this can be presented in a table form as;

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50                                          $12.55

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Take the values as ordered pairs to represent coordinates for points that satisfy the linear function

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Finding the slope of the graph using these points

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m=Δy=17.23-12.55 =4.68

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m=4.68/52 =0.09

Finding the equation of the linear function using m=0.09, and point (50,12.55)

m=Δy/Δx

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0.09(x-50)=y-12.55

0.09x-4.5=y-12.55

0.09x-4.5+12.55=y

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y=0.09*101 +8.05

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Learn More

Linear functions : brainly.com/question/11052356

Keyword : linear function

#LearnwithBrainly

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A statistics is a measure of a sample.  The number computed using an estimate of N would be based on a sample, since it is an estimate of N; this makes it a statistic.

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