7. 12a +5-8a=-1
i do not know how to do it

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

Two line segments are shown in the figure below. suppose that the length of the line along the x-axis is 6, and the length of the hypotenuse of the triangle is 10. what is the equation of the hypotenuse line (shown in red, below)?