Use the graph provided
How many solutions exist for the system?
x+2y=-1
2x+3y=0

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points

Tim has obtained a 3/27 balloon mortgage. after the initial period, he decided to refinance the balloon payment with a new 30-year mortgage. how many years will he be paying for his mortgage in total?