Answer:
1) 1 and 4
2) 1 and 2
3) 1 and 5
4) 2 and 3
5) 130
6) 90
7) 25
8) 115
9) 70
10) 115
11) 40
12) 105
Step-by-step explanation:
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S = n(a1 + an)/2
2S = n(a1 + an)
2S = na1 + nan
nan = 2S - na1
an = (2S - n a1)/n
Answer:
(a + b -c) x (x +y )
Step-by-step explanation:
Firstly, factor out x from the expression
Then, factor out the y from the expression
Answer:
(-3,5)
Step-by-step explanation:
In reflections the x axis is the opposite only
