Question

using appropriate properties find ...​

Answer 1

Answer:

27/700

please check yourself

only then you can learn and improve

2/5×(-3/5)= -6/25

1/6×3/2=3/6×1/2=1/2×1/2=1/4

1/14×2/5=2/70

so required sum

-6/25 + 1/4 + 2/70

(-6×4+25×1)/(25×4)+ 2/70

[cross multiplication and taking product of denominators as denominator]

1/100+2/70=(70×1+100×2)/(70×100)=270/7000=27/700

Answer 2

Answer:

The muscular system is responsible for the movement of the human body. Attached to the bones of the skeletal system are about 700 named muscles that make up roughly half of a person's body weight. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves

I literally don't know anything

so sorry sister