3 is wrong. It is 105,000 4) 13/60=0.21666 0.21666*360=78 so 78 degrees 5)sequential difference is 7 and the first term is 4 so 7n-3 6)4x-4=2x-10,2x=-6,x=-3 7)5(4)(5)+4^2=100+16=116 8)(-3,7) 11)a=180-70=110 b=a=110 c=70 12)Sum or angles of a hexagon=(6-2)(180)=720. 720/6=120 13)3/51 because there are only 3 aces in the deck and 51 cards in total You did 14 wrong. It should be 9/12*144=108 17)First and third. Plug in 0 for x 18)72/9*2=16 72/9*7=56 so 16:56 19)2*3+2*3/2=9
more the letter x is often used in algebra to mean a value that is not yet known is is calld a variable or sometimes an unknown. in x+2=7,x is a variable but we can work out its value if we try
