Question

si: a/5=b/3=c/4=d/7 y (a+b)(c+d)=352 calcula a.b+c.d

Answer 1

Respuesta:

172

Explicación paso a paso:

$\frac{a}{5}=\frac{b}{3}=\frac{c}{4}=\frac{d}{7}=k$

a=5k, b=3k, c=4k, d=7k

(a+b)(c+d)=352=32x11=4x8x11....  (5k+3k)(4k+7k)=(8k)(11k)=8x2x11x2

k=2

a=10, b=6, c=8, d=14

a.b+c.d=10x6+8x14=172