How do show your work with the answer and also how do you answer this? also are the bills similar?

Well first to show your work you will have to multiply 3.13 by 7.42. to get an area of 23.2246 . Then you multiply 2.61 by 6.14 to get the area of 16.0254. They are similar because they are both decimal number .

Ok for 22 you just have to add both of them together and set them to equal 90. ( 4z+ 3z+6=90). then you solve for z by combining like terms giving you 7z+6=90 then subtract 6from both side leaving you with 7z=84. then divide to get z=12. you thin plug 12 into the angles such as 4(12) and 3(12)+6 which give you 48 and 42 degrees and to double check just add your 2 degrees together to form 90.

on problem 20, add both angles together and set to 180 (4h+5+8h-5=180) since the line is like half a circle. then combine like terms (12h=180) divide by 12 and then after dividing 180 by 12 and getting 15 you substitute 15 in for h.