Answer:
undefined, stays on x so straight vertical - vertical line is undef slope
Basically
just put the coeficinets of each variable in the apropriate row
example
ax+by=c and
dx+ey=f
would go in like this
![\left[\begin{array}{ccc}a&b&|c\\d&e&|f\end{array}\right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Da%26b%26%7Cc%5C%5Cd%26e%26%7Cf%5Cend%7Barray%7D%5Cright%5D%20)
so
3x+1=1 and
0x-1y=5
![\left[\begin{array}{ccc}3&1&|1\\0&-1&|5\end{array}\right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%261%26%7C1%5C%5C0%26-1%26%7C5%5Cend%7Barray%7D%5Cright%5D%20)
D is answer
One cubic yard is equal to 27 cubic feet because one yard is equal to 3 feet
<em><u>Solution:</u></em>
Given that, there 27 cubic feet in one cubic yard
Yard and feet are units of distance
1 Yard (yd) is equal to 3 feet (ft). To convert yards to feet, multiply the yard value by 3.
<em><u>The conversion factor for 1 yard to 1 feet is given as:</u></em>

Now find for 1 cubic yard . Cubic yard means yard raised to power 3
Therefore,

Thus one cubic yard is equal to 27 cubic feet
Therefore, there are 27 cubic feet in one cubic feet
Answer: 
Step-by-step explanation:

Where;

The correct answer is b
a thanks and a brainliest would be appreciated :)