3. Simplify, then evaluate, if: (i)m=1,n=-1, p =-2
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(ii) m== ,n== ,p==
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a) 2m(p − n) +3m(n+ p)
b)(-3m’n +2mn – p)+(4mºn – 6mn +6p) – 2(m’n – 2mn +3p)

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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