Answer:
x=3, y=-2. (3, -2).
Step-by-step explanation:
4x+2y=8
5x+3y=9
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simplify 4x+2y=8 into 2x+y=4
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2x+y=4
5x+3y=9
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y=4-2x
5x+3(4-2x)=9
5x+12-6x=9
-x=9-12
-x=-3
x=3
2(3)+y=4
6+y=4
y=4-6
y=-2
Answer:
60 degrees
Step-by-step explanation:
because two inner angles equals the opposite side's outer angle, we can do this
3y + 13 + 4y = 118
we combine like terms
7y + 13 = 118
subtract
7y = 105
and then divide
y = 15
then we do the equation for A's angle
4(15) = 60
Answer:
1- 7cm × 7 cm - 49 cm squ.
13cm × 13 cm -169. cm square
19×19-361 cm square
Answer:

Step-by-step explanation:
There are only 2 solutions for none of the rooks can capture any of the other rooks: only if they are laid out in either of the 2 diagonal of the chess board
The number of possible combination for the rock to laid out in 8x8 (64 slots) chess board
possible combination
So the probability is pretty thin
