The circle shown is a unit circle where /a= pie/3

evaluate cos/a for the circle

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Choose the equation that represents the graph below: (1 point) graph of a line passing through points negative 3 comma 0 and 0 comma 3 y = x − 3 y = −x + 3 y = −x − 3 y = x + 3 will award !

Plz hurry evaluate the expression a+b where a=8 and b=19