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Tom [10]
3 years ago
9

PLEASE HELP ME ASAP!! I had trouble with this and it is now over due

Mathematics
1 answer:
erica [24]3 years ago
3 0

Answer:

Shira: x = 8

Samuel: m = 0

Step-by-step explanation:

Shira's mistake was that she subtracted 2 from both sides instead of adding to on both sides.

Correct Solving:

2x - 2 = 14

Add 2 to both sides;

2x = 16

Divide both sides by 2;

x = 8

Samuel's mistake was that when he distributed -2 to 8m and 8 he put the wrong sign for -2 * 8.

Correct Solving:

-2(8m + 8) = -16

Distribute;

-16m - 16 = -16

Add 16 to both sides;

-16m = 0

Divide both sides by -16;

m = 0

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Answer:

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Step-by-step explanation:

To find this we see how much is made in a year which is 1.4 billion gallons in the U.S.

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3 years ago
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slamgirl [31]

Answer:

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Step-by-step explanation:

You have the following system of equations:

x+2y-z=-3\ \ \ \ \ (1)\\\\2x-y+z=5\ \ \ \ \ \ (2)\\\\x-y+z=4\ \ \ \ \ (3)

First, you can subtract euqation (3) to equation (1):

x + 2y - z = -3

<u>-x +y  -z = - 4 </u>

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Next, you can multiply equation (3) by 2 and subtract it to equation (2):

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You multiply equation (5) by 2 and sum (5) with (4):

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<u>    3y  -2z= -7</u>

  y  + 0 = -1

Then y = -1

Next, you replace y=-1 in (5) to obtain z:

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