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tia_tia [17]
3 years ago
14

15 POINTSSSSSS!!!

Mathematics
2 answers:
Reika [66]3 years ago
8 0

Answer:

a + b + c = 15

a + 2xb

2xb + -20c

<h3>For the first number, it is 7</h3><h3>For the second number, it is 14</h3><h3>For the third number, it is -6</h3>

<em><u>MATH CHECK:</u></em>

14 - 20 = (-6)

14 + (-6) = 8

8 + 7 = 15

<h3>THIRD NUMBER = (-6)</h3>
Natali [406]3 years ago
5 0

x+y+z=15

y =2x

z=y-20

substitute these equations into the first

x+2x+y-20 =15

now substitute 2x in for y

x + 2x +2x-20 =15

combine like terms

5x-20 =15

add 20 to each side

5x = 35

divide by 5

x=7

y =2x

y =14

z = y-20

z=14-20

z=-6

The third number is -6


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Fynjy0 [20]

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The equation of a line in point- slope form is

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4 0
3 years ago
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A builder makes drainpipes that drop 1cm over a horizontal distance of 30cm to prevent clogs. A certain drainpipe needs to cover
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700.39cm

Step-by-step explanation:

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8 0
3 years ago
Still gonna cry leave step by step pls
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Two cars are traveling in the same direction. the first car is going 40 mph and the second car is going 55 mph. the first car le
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I hope this helps you




distance=speed×time



first cars time t




second cars time t+3



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4 0
3 years ago
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