Multply both equations by 2 leaving
x + 2y = 8
x - 2y = -2
Add the equations giving
2x = 6
x = 3
Substitute 3 in the top equation
3 + 2y = 8
2y = -5
y = -2.5
<span>Sin(-x) = -sin x for all values of x, IT IS TRUE
Because sinx is an odd function</span>
How do people......I just don't understand this
4/3 * pi * r^3
4/3 * 3.14 * 10^3
4/3 * 3.14 * 1000
4/3 * 3140 = 4186.66 rounds to 4187 in^3