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jasenka [17]
3 years ago
6

12x – 5y = -20 y = x +4

Mathematics
2 answers:
kari74 [83]3 years ago
8 0

Answer:

x = \frac{-40}{7} , y = -1.71

Step-by-step explanation:

sub y = x+4 in the first equation to get:

12 x - 5 (x+4) = -20

Simplify:

12 x - 5 x + 20 = -20

Further simplify:

7 x = - 40

Divie both sides by 7 to get:

x = \frac{-40}{7}

--> x = -5.7

Sub x = \frac{-40}{7}  in the second equation to get:

y = \frac{-40}{7}  + 4  = -1.71

BaLLatris [955]3 years ago
7 0

Answer: x=3,y=-8

Step-by-step explanation: i hope this help

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andre [41]

Answer:

A)  T=\frac{-20}{4}

B) T = -5 °C

Step-by-step explanation:

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T=\frac{-20}{4}

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4 years ago
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Temka [501]
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5 0
4 years ago
Y is inversely proportional to x<br> when y=7 , x=9<br> work out an equation connecting y and x
rusak2 [61]

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Step-by-step explanation:

This is variation, now to the question.

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---

x

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5 0
4 years ago
tia is buying paper cups and plates. cups come in package of 12 ,and plates come in package of 10.she wants to buy the same numb
tester [92]


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7 0
4 years ago
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prohojiy [21]

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if there are no typos then only 1) is correct.

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4)

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7 0
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