Answer:
4.
5.
6. or 3.5
Step-by-step explanation:
Multiply those 2 values whose diagonal has both terms and divide by the term whose diagonal has the variable.
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3
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(2n+6)(n+3)=
(2*n+2*3)(n+3)=
2(n+3)(n+3)=.....(1)
2(n+3)^2=....(2)
2(n^2+2*n*3+3^2) =
2(n^2+6n+9)=....(3)
2n^2+2*6n+2*9=
2n^2+12n+18.... (4)
x=5 , y=12
Angle 3=140
Angle 4=100