1. The first equation is - 2x + 5y = 0
Second equation is 
5y = 2x
- 2x + 5y = 0
Hence, the two equations are equivalent.
2. 




Hence, the equations are consistent.
3. 




Hence, the equations are consistent.
4. Equations can be re-arranged as:
x + y - 4 = 0 and
x + y + 6 = 0







Hence, the equations are inconsistent.
5. If we multiply the first equation by 4, we will get,
2y = -4x + 20 which is the second equation.
Hence, the equations are equivalent.
The answer for this question should be the last pair which is 6, -6
<span>to solve circumference of a circle is diameter times pi.
C=141.3 cm</span>
Answer:
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Answer:
i don't even know the answer to this stuff lol