Final answer:
The equation that will let Lena earn a profit of $3500 if she sells 20 of Fidget A and 60 of Fidget B is option a) 20x + 60y = 3500. This equation can be used to calculate the values of x and y to meet the profit target.
Step-by-step explanation:
The equation that will let Lena earn a profit of $3500 if she sells 20 of Fidget A and 60 of Fidget B is option a) 20x + 60y = 3500.
In this equation, x represents the price for each Fidget A and y represents the price for each Fidget B. The equation states that for 20 Fidget A toys and 60 Fidget B toys sold, the total profit will be $3500.
This equation can be used to calculate the values of x and y to meet the profit target.