Alguém poderia me responder? Verifique quais pares ordenados são solução da equação:

4 x + 2 y = 20

a) (2;6)

b) (-1; 8)

c) (-3;16)

d) (5,-1)

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.