Answer:
The answer is B 1/4 + 2/6 + 4/10
Step-by-step explanation:
it just makes sense im sorry i cant explain :( i hope it helps either way xx <3
I think no. 12 is a: y=x-3
A) <span>3x + </span><span>2.5y= 27
B) 5x – 2.5y = 5
</span>Adding A and B we get
8x = 32
x = 4
A) 3*4 + <span>2.5y= 27
</span>A) 12 + <span>2.5y= 27
</span>A) <span>2.5y= 15
y = 6
</span>
2 x(3 + 2 x x ) = 54
2(3 + 2x)
6+4x=54
4x = 54-6
4x = 48
4x/4 = 48/4
x = 12
Kinetic energy formula is
K.E =

mv²
m = 0.5 kg
v = 3 m/s
Plug in the given.
K.E =

× (0.5) × (3)²
=
2.25 J