Mr newman bought a ticket to a chili supper and spend a total of $30 he bought a combination of adult tickets for $3 each which system of equations below would determine the number of child ticket and is he number of adult tickets a he bought

15 point ! ~ see if you know the answer to both you!

1foot = 12 inches; 1 yard = 3 feet

3-12. write each answer with a reasonable number of figures. find the absolute uncertainty and percent relative uncertainty for each answer. (a) [12.41 (±0.09) + 4.16 (±0.01)] x 7.068 2 (±0.000 4) =? (b) [3.26 (±0.10) x 8.47 (±0.05)] - 0.18 (±0.06) =? (c) 6.843 (±0.008) x 104 + [2.09 (±0.04)- 1.63 (±0.01)] =?