Question

alguien que me pueda ayudar​

Answer 1

b) 12/35 , comprobacion 12/35 x 5/4 = 3/7

c) $\frac{\frac{4}{3} }{\frac{7}{10} } = \frac{4}{3} :\frac{7}{10}$ = 40/21, comprobacion 40/21 x 7/10 = 4/3

d) $\frac{\frac{7}{10} }{\frac{4}{3} } = \frac{7}{10}: \frac{4}{3}$ = 21/40, comprobacion 21/40 x 4/3 = 7/10

II.

$15 =\frac{5}{2} X a$

$\frac{2}{5} X 15 = \frac{2}{5} X \frac{5}{2}a$

$2 X 3=\frac{1}{5} X 5a$

2 x 3 = a

6 = a

El lado a = 6

Comprobamos

15 = $\frac{5}{2} X 6$

15 = 5 X 3

15 = 15