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kirza4 [7]
3 years ago
11

Which equations results from adding the equations in this system? x+6y=9 -x+2y=-15

Mathematics
1 answer:
UkoKoshka [18]3 years ago
4 0

Answer:

8y = -6

Step-by-step explanation:

Simply add the equations as you would numbers.

The 'x's cancel each other out. The 'y's add together as normal numbers.

9 + (-15) = -6

Hope that this helps!

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We first find the z-score for each end of this interval:

z = (x-μ)/(σ/√n) = (100-110)/(18/√49) = -10/(18/7) = -3.89

z = (x-μ)/(σ/√n) = (115-110)/(18/√49) = 5/(18/7) = 1.94

Using a z-table (http://www.z-table.com) we see that the probability that a score is less than the first z-score is 0.  The probability under the curve to the left of, less than, the second z-score is 0.9738.  Subtracting these we find the area between them:
0.9738 - 0 = 0.9738.
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the perimeter of the rectangle is 86 inches. if the length is 3 inches longer that the width, find the width of a rectangle.
yawa3891 [41]
The length is 23in and the width is 20 inches
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Solve the equation 3(x+1)+2x=1/2(10x-14) <br>Plz show the steps
Umnica [9.8K]

Answer:

x=-2

Step-by-step explanation

1) Remove () and Rewrite

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2) Collect Like Terms

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What are the answers to these and how do I do it
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McDonalds sells quarter-pound cheeseburgers for .99 cents last saturday.they sold 310 of these cheeseburgers. how many pounds of
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