Answer:
9.881
Step-by-step explanation:
82.1-2.1(5.25+29.14)=9.881
82.1-2.1(34.39)=9.881
82.1-72.219=9.881
9.881=9.881
Charlie would save $143.8 after 7 months.
10
Answer: x = -4; x = -1; x = 3
see in this graph, at x = {-4; -1; 3} => y = 0
=> the zeros of the function are -4; -1; 3
