The solution to the system of equations below is (-2,-1). 2x-3y=-1 11x-9y=-13 when the first equations is multiplied by -3,the sun of the two equations is equivalent to 5x =-10. which system of equations will also have a solution of (-2,-1)?

How do you find the area of this triangle.

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.

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