<span>17 protons and 20 neutrons add up to a molecular mass of 37</span>
So we assume that x=x and y=y is true for both situations so
3x+2y=-2
6x-y=6
6x-y=6
add y to both sides
6x=6+y
subtract 6 from both sides
6x-6=y
subsitute (6x-6) for y in first equation
3x+2(6x-6)=-2
distribute
3x+12x-12=-2
add like terms
15x-12=-2
add 12 to both sides
15x=10
divide both sides by 15
x=2/3
subsitute
3x+2y=-2
3(2/3)+2y=-2
6/3+2y=-2
2+2y=-2
subtract 2 from both sides
2y=-4
divide both sides by 2
y=-2
x=2/3
y=-2
solution in (x,y) form
(2/3,-2)
I would say A because it is rotated 180 degrees relative to the origin.
40 degrees because i just got it right, and shout out to cash carti!
B. same angle, congruent
c. both angles are 90 degrees so it equals 180 when added together
e. congruent angles
g. supplement means when 2 angles have a sum of 180 and since both are 90 it has a sum of 180
h.
