Question

1)determianti valoarea raportului 1,2 ha si 250 m²
2) daca a supra b=4 supra 3 aflati 3b supra 2b
3) daca 4x supra 2y = 1,25 aflati y supra x
4) daca a supra 4 = 3 supra 5 si a+b=16  aflati a si b

va rogg mult (15 puncte+ cel mai bun raspuns)

Answer 1

1) $\frac{1,2ha}{250 m^{2} } = \frac{12000 m^{2} }{250 m^{2} } =48$
2)$\frac{a}{b}= \frac{4}{3} => a= \frac{4b}{3} =>3a=4b$
$\frac{3a}{2b} = \frac{4b}{2b}=2$
3) $\frac{4x}{2y}=1,25 <=> \frac{2x}{y} = \frac{5}{4} =>$ $\frac{y}{2x}= \frac{4}{5}$        |*2
$\frac{y}{x} = \frac{8}{5}$
4) $\frac{a}{4} = \frac{3}{5} => a= \frac{4*3}{5}= 2,4 =>b=16-2,4=13,6$