Question

PF me ajudem exercício com foto PF resolvam todos

Answer 1

Oi

10) 

15/10 = x/14 

3/2 = x/14

2x = 42

x = 42/2 = 21

AC = 15 + x = 15 + 21 = 36

11)

(x + 30)/25 = (x + 10)/(x - 5)

(x + 30)*(x - 5) = 25x + 250

x² + 25x - 150 = 25x + 250

x² = 400

x = 20

AB = 25 + x - 5 = 25 + 20 - 5 = 40

AC = x + 30 + x + 10 = 20 + 30 + 20 + 10 = 80

12)

x/a = 3x/b 

a + b = 8 

1/a = 3/b

a/1 = b/3

b/3 + b = 8
b + 3b = 24
4b = 24
b = 6

a + b = 8
a + 6 = 8

a = 2