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emmainna [20.7K]
3 years ago
15

Which of the following ordered pairs are solutions to the system of equations below?

Mathematics
1 answer:
Genrish500 [490]3 years ago
4 0

Answer:

x = 43/12

y = - 35/6

Step-by-step explanation:

4x + 4y = -9

y = 2x - 13

4x + 4(2x - 13) = - 9

4x + 8x - 52 = - 9

12x = 52 - 9

12x = 43

x = 43/12

y = 2×43/12 - 13

y = 86/12 - ¹²⁾13

y = (86 - 156)/12

y = - 70/12

y = - 35/6

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Step-by-step explanation:

A = B

7x + 40° = 3x + 112°

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4x = 72°

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hope it help

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3 years ago
Erica can paint her room 5 hours .If she had her friend Rachel help her , they can paint the room together in 3 hours .How long
LUCKY_DIMON [66]

Answer:

7 hours 30min

Step-by-step explanation:

Step one :

Given data

We are told that Erica can paint 1 room in 5hours

Her work rate is 1/5 room per hour

And also with the assistance of her friend they can paint 1 room in 3 hours

Hence their combined work rate is 1/3 room per hour

Step two

The combined work expression is

1/A+1/B=1/T

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4 0
3 years ago
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allochka39001 [22]

Answer

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Step-by-step explanation:

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Step-by-step explanation:

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2 years ago
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