This is geometry.. If lines l and M are parallel than we look at the line that goes from bottom left to the top right. this is called the transversal. When lines are parallel then alternate interior angles are congruent. That means opposite sides of the transversal and inside the parallel lines. That means 28 and are congruent.
Your answer is 28.. I hope I helped you learn something..
You should use Order of Operations or PEDMAS for this (Parenthesis, Exponents, Division and Multiplication in the order they appear, Addition and Subtraction in the order they appear). So we do the 2+12 because that is in parentheses first which gives 14-3+6. Next we do 14-3 because there are no exponents and no division or multiplication, which gives 11+6. This yields your answer, 17.
To put it in slope intercept form, you want to solve for y.
5y = -6x + 50
y = -6/5x + 10
So, your slope is -6/5 (or -1.2) and your y-intercept is +10.
