Answer:
See below
Step-by-step explanation:
Each person donates $10 plus the $70 he got must be at least $250.
10x + 70 [tex]\geq[/tex] 250
10x [tex]\geq[/tex] 180
x [tex]\geq[/tex] 18. To get at least $250, 18 people need to contribute.
On the other side:
10x + 70 [tex]\leq[/tex] 350
10x [tex]\leq[/tex] 280
x [tex]\leq[/tex] 28 To get $350, 28 people need to contribute.
Write the entire inequality as 250 [tex]\leq[/tex] 10x + 70 [tex]\leq[/tex] 350
