3 years ago

3x + y = 8 What is the answer

1 answer:

7 0

Depends on what you are asking
Y = Mx + c
Finding the equation of the line
Which is y = -3x + 8

Or for finding y
Y = 8-3x
Or if u wanna find x

You subtract y from both sides
3x = 8 - y
Dividing both sides by 3
3x/3 = 8/3 -y/3
Which leave 8 -y divided by 3

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Step-by-step explanation:

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3 years ago

1 ) Tim earns $12.50 an hour cleaning houses. If he works from 8:00am to 2:00pm,

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$x+y=11 \\
-x=-y-9 \\ \\
\hbox{substitute the second equation by -1} \\ \\
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x=y+9 \\ \\
\hbox{substitute y+9 for x in the first equation} \\ \\
y+9+y=11 \\
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The answer is B.

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Step-by-step explanation:

As the plane is parallel to the base, the ratio between plane's length and width is equal to the ratio of that of the base. -> similar shape.

Moreover, it also divided the rectangular prism into 2 smaller rectangular prism. hence the plane is identical to the base. Hence, same dimension.

see photo

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