Amount of down payment = $650.
Jordan gets money by mowing lawns = $25 per lawn.
Sharla gets money by selling handmade necklaces for = $15 each necklace.
The number of lawns Jordan mows = x.
The number of necklaces Sharla sells = y.
A) Total money raised by Jordan to move x lawns at the rate $25 per lawn = 25x.
Total money raised by Sharla by selling y handmade necklaces for $15 per necklace = 15y.
Total money Sharla can raise by selling 40 necklaces at the rate $15 each = 40 × 15 = $600.
B) Because Sharla can raise maximum $600, therefore sharla can not afford the down payment with the money she earns selling her necklaces.