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77julia77 [94]
3 years ago
9

Solve the systems using substitution. − 2x − 5y = − 5 x = 5y − 20

Mathematics
1 answer:
Law Incorporation [45]3 years ago
7 0
-2(5y-20) - 5y = -5
-10y + 40 - 5y = -5
-15y + 40 = -5
-15y = -45, y = 3
x = 5(3) - 20
x = 15 - 20, x = -5
Solution: x = -5, y = 3... or (-5,3)
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A man does not eat for. One week how many hours is that
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Answer:

1 week = 168 hours

Step-by-step explanation:

1 week = 7 days

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8 0
3 years ago
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Can I get help with these too? Thank you!!!!!
Anastasy [175]
For ABC:

The interior angle of C is 180 - 142 = 38
The three interior angles add up to 180°
(2x - 15) + (x - 5) + 38 = 180
3x - 20 + 38 = 180
3x + 18 = 180
3x = 162
x = 54

The measure of angle ABC = x - 5 = 54 - 5 = 49

For JKL:
The interior angle of L is 180 - 100 = 80°
The 3 interior angles add up to 180°
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4x + 16 + 80 = 180
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4x = 84
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7 0
3 years ago
The discount price of a pair of shoes is $22. what is the original price
Goshia [24]
The original price is $88.
how I got the answer:
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16. Find the value of y. ​
devlian [24]

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3 years ago
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