Answer:
1) 15
2) 10
3) 11
4) -4
5) -8
6) 12
7) 14
8) -6
Explanation:
plug the values given into each equation for example
1) 2c - d at c=6, d=-3
2(6) -(-3) = 12 + 3 = 15
3.6m questions
4.7m answers