Thomas works as a salesperson on saturday and sunday at the verizon store he is payed 46.50 each day and for every smart phone he sells he also earns 5% of the sale price. the store is having a huge sale and is selling smart phones this saturday and sunday for $70 thomas wants his total earnings to be at least $150 how many smart phones must he sell in order to reach his goal

So he is paid 46.5 flat  every day
he earns 5% of each smart phone he sells
at the time of the problem, smart phones sell for 70 so he earns 5% or 70 or 5/100 of 70 or 1/20 of 70 or 70/20 or 7/2 or 3 and 1/2 or $3.50 per phone he sells

so pay must be at lease 150 so
pay=46.5+ (# of phones times 3.50)
150<46.50+(number of pones times 3.50)
solve for number of phones
subtract 46.5 from both sides
103.5<(number of phonest imes 3.5)
divdie both sides by 3.5
29.57<number of phones
round up since can't sell a fraction of a phone
30
he has to sell at leas 30 phones