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Pepsi [2]
3 years ago
9

Please help y=-4x-23 y=-2x-8

Mathematics
1 answer:
lana [24]3 years ago
4 0

Answer:

x=-15/2 and y=7

Step-by-step explanation:

y=-4x-23

y=-2x-8

Two methods, substitution and elimination. Elimination is the easiest, so you can subtract the equations.

y=-4x-23

-(y=-2x-8)

----------------------

y=-4x-23

-y=2x+8

------------ so solve :)

0=-2x-15

becomes 2x=-15

so x=-15/2

------------------------ plug in x to solve for y

and you get y=7

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3 years ago
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7/9 in simplest form
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change to  improper fractions

42 1/3

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copy dot flip

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------------     = ------------

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x = 1 * 4/127

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it takes 4/127 of 1 hour (approx .03 hours)

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