Roberto comprou 2 cadernos a R$12,40 cada duas borrachas a R$0,80 centavos cada uma meia dúzia de lápis a R$0,60 centavos e meia dezena de canetas a R$2,10. Se Roberto tinha apenas uma nota de R$50,00quanto recebeu de troco?

35x 3= 105

step-by-step explanation:

35+35= 70   70 + 35= 105

$2416.6

step-by-step explanation:

per hour = $ 25

total work time = 35

commission = 15%

total she has to make = $ 4,500

let she sold x dollar products

so her commission will be 15 % of x

now

total = weekly basic pay + commission

4500= (25*35) + 15 % of x

4500=875 + * x

4500-875 =   * x

3625= * x

multiplying wwith 100 on both sides gives

36250 = 15 x

now

x =  

x= $2416.6