Question

am nevoie de ajutor dau coroana! ex 8

Answer 1

PM+PN=MN

$\frac{PM}{PN} =\frac{4}{5} => PM=4k ,  PN=5k$ unde k este rezultatul raportului (coeficient de proportionalitate)

Atunci avem: MN=PM+PN=4k+5k=9k

a) $\frac{PN}{PM}=\frac{5k}{4k}=\frac{5}{4}$

b) $\frac{PN}{MN}=\frac{5k}{9k}=\frac{5}{9}$

c) $\frac{MN}{PN}=\frac{9k}{5k}=\frac{9}{5}$

d) $\frac{PM}{MN}=\frac{4k}{9k}=\frac{4}{9}$