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Usimov [2.4K]
4 years ago
9

ELIMINATION!! How do you work out 4x+7y= -80 and 3x+5y= -58

Mathematics
2 answers:
Trava [24]4 years ago
7 0
3(4x+7y=-80)
-4(3x+5y=-58)

12x+21y=-240
-12x-20y=232
the x's cancel out and you're left with
y=8
then you plug in y and get
4x+7(8)=-80
4x+28=-80
4x=-108
x=27
Tom [10]4 years ago
4 0
Oh, I love elimination <3 Would you like to eliminate x or y?
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Ok so I assume
28 and decreased by 12.5%

percent means partst out of 100 so
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first find 12.5% of 28 then subtract
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decrease
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answer is 24.5
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We know that to check if function is absolute minimum or absolute maximum by putting the value of modulus either equal to zero or equal to or less than zero and simplify.

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5 0
1 year ago
Sierra has plotted two vertices of a rectangle at (3,2) and (8,2). What is the length of the sides of the rectangle
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Using the formula

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