Answer:
11. Linear Equation: C = 10L + 12.
12. Cost for 4 lessons: $52.
Step-by-step explanation:
-7/24, because you can just do this question in reverse to figure out an answer. (3/8 - 2/3)
8 11/12 To solve this you have to convert 8 1/6 to 8 2/12 and 3/4 to 9/12. 8 2/12 + 9/12 =8 11/12
The fourth one should be the correct answer
X + 8x = 81
9x = 81, x = 9
y = 8(9), y = 72
Solution: (9, 72)