Answer:
-3
Step-by-step explanation:
1.5x + 1.3x = -8.4
2.8x = -8.4
x=-3
B has two pre-images of -7 so it is not a function
Answer: 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 98
You basically try a whole bunch of numbers by taking those two numbers and another then adding them and dividing them by 3.
