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julia-pushkina [17]
3 years ago
14

In a science experiment an independent variable is

Mathematics
1 answer:
kvasek [131]3 years ago
6 0
A variable that remains unchanged throughout the experiment.
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Solve the following simultaneous linear equations.<br>2x + y = 5<br>4x – 3y = -10​
Jet001 [13]

Answer:

(1/2,4)

Step-by-step explanation:

First, determine y in first equation: 2x+y=5 or  y=5-2x

replace value of y determined in first equation (5-2x) into 2nd equation    

4x-3(5-2x)=-10

4x-15+6x=10

10x=5

x=1/2

put value of x into either equation to solve for y so

2(1/2)+y=5

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y=4

answer: x=1/2, y=4

check answer by substituting x and y into either equation:

4x-3y=-10

4(1/2)-3(4)=-10

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or

2x+y=5

2(1/2)+4=5

1+4=5

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7 0
3 years ago
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