To determine the Earnings of Shelley last week, we need to make relations with the values that are given. We let x as the total amount she earned last week by x and y as the additional amount she earned this week We do as follows:
20% additional amount she earned this week = y / 72 - y y = $ 12
The set A U B is represented by shading both circles A and B (also the overlapping region as well). Any point in set A U B will be in either A, B or both.
Angels on a triangle is 180° so you add 75 and 50 which gives you 125 then u take away that by 180 to find x and that your answer I'm going to let you work it out since its easy question
