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matrenka [14]
3 years ago
12

Which is the graph 3x + 5y=-15

Mathematics
1 answer:
matrenka [14]3 years ago
8 0

It's a linear function. We need only two points to the plotting of the graph.

3x+5y=-15\qquad\text{subtract 3x from both sides}\\\\5y=-3x-15\qquad\text{divide both sides by 5}\\\\y=-\dfrac{3}{5}x-3\\\\for\ x=0\to y=-\dfrac{3}{5}(0)-3=0-3=-3\to(0,\ -3)\\\\for\ x=-5\to y=-\dfrac{3}{5}(-5)-3=-3+3=0\to(-5,\ 0)

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OLga [1]
An= mth term.
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a₁₂=41
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a₁₅=140
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With the equiations (1) and (2)  build a system of equations
a₁+11d=41
a₁+14d=140

we solve it.
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  a₁+14d=140
--------------------
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a₁+11d=41
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To check:
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