Y = -2x + 5 and 2x + y = -7

not true

Explanation:

substitution is convenient here

2x + (-2x + 5) = -7

2x - 2x - 5 = -7

-5 = -7

not an equality, thus the lines are parallel and have no intersection

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

0.3x0.21x0.08kg=mass 1 sheet

mass 500 = 500xmass 1

volume pile = 0.3x0.2x0.048

density=mass/volume= 500xmass 1/0.3x0.2x0.048

v patient student