Question

Me ayudan a partir del 8 hacía allá? por favooor :(

Answer 1

8)----------------------------------------------------------------
A=bxh
A=13cmx7cm=91 cm2

P=2b+2h
P=2(13)+2(7)= 40 cm

9)-----------------------------------------------------------------------
A=(bxh)/2
A=(17kmx25km)/2
A= 212.5 km2

P= l1+l2+l3
primero calculas:
c2=a2+b2
c=√a2+b2
c=√(17alcuadrado)(12.5alcuadrado)
c=√289+156.5
c=√445.5
c=21.10
entonces tienes
P=l1+l2+l3
P=17km+25km+21.10km
p= 63.1 km
10)----------------------------------------------------------------------------
-300+x=-658
x=-658+300
x=-358

-3x=89
x=89/-3
x= -29.66

-560+x=-87
x=-87+560
x= 473

11)-------------------------------------------------------------------------------------------
a) 2^5=32
b) 3^3=81
c) 5^4=625

12)------------------------------------------------------------------------------------------

a)x/2=15/6
x=(15/6)(2)
x=5

b)63/x =  9/5 
63=(9/5)x
x=63/(9/5)
X=35

c)8/5 =12/y
(8/5)(y)=12
y=12/(8/5)
y=15/2

d)49/56 = y/8
y=(49/56)(8)
y=7

13)-----------------------------------------------------------------------------------------
regla de 3 
3metros--------800$
8 metros---------X$

X=(8)(800)/3
x=2133.33 $

14)--------------------------------------------------------------------
regla de 3
120 metros---------4 segundos
 x metros----------- 52 segundos

X=(120)(52)/4
x=1560 metros