C + a = 140......a = 140 - c
5.3c + 9.4a = 1086.4
5.3c + 9.4(140 - c) = 1086.4
5.3c + 1316 - 9.4c = 1086.4
5.3c - 9.4c = 1086.4 - 1316
-4.1c = - 229.6
c = -229.6 / -4.1
c = 56......so their were 56 child tickets sold
Even i need help with this one lol
Q14) 8 times 1/2=4
Q15) 3/4>1/2 (1/2 =2/4)
Q16) 1/8, 3/8, 5/8