Answer:
Step-by-step explanation:
The given system of equations is now reduced:
1) 
, 
, 
, 
Given
2) 
By 1)
3) 
2) in 1)
4) 
By 1)
5) ![[c+(b+c)]+b = c](https://tex.z-dn.net/?f=%5Bc%2B%28b%2Bc%29%5D%2Bb%20%3D%20c)
4) in 3)
6) 
Algebra
7) 
Algebra
8) 
7) in 4)/Algebra
9) 
7) and 8) in 2)/Algebra
10) 9), 1), 7) and 8)/Algebra/Result
Answer:
i Don't know this but other's can help you.
Answer:
3 hours or 180 minutes
Step-by-step explanation:
This one should be an easy one
First, lets convert everything to units
35 + (1 hour and 10 minutes or 70 minutes) + (1 hour and 15 minutes or 75 minutes) = 35 + 70 + 75 = 180 minutes, or 3 hours.
Hope it helps :)
2/5 is equivalent to 4/10 so at the end of February 4/10 was used up
And at the end of January, 3/10 was used
so 4/10 + 3/10 = 7/10
At the end of February, 7/10 of the wood was used
parallogram it has exactly 2 pairs of congruent angles
