Mrs. Watanabe is choosing a cell phone plan. One plan costs $35 a month and includes 450 minutes. The charge for each minute over 450 is $0.16. The company also offers an unlimited calling plan with a $55 monthly charge.

this is only a statement with no question so I'm just assuming the question here:

It would be cheaper to buy the $$35/month plan if he uses under 575 min/month and cheaper to buy the $55 plan if using over 575 min/month

Step-by-step explanation:

$35 + x$0.16 = $55

-35. -35

x$0.16 = $20

÷ 0.16. ÷0.16

x = 125 min

450 + 125 = 575 min

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.