Patrick purchased some supplies for his guitar students. He bought 25 guitar picks and 25 guitar strings since they only cost $1 more than the guitar picks. He spent a total of $40. If c is the cost of one guitar pick, find the cost of one guitar string. (1 point)
Let c be the cost of one guitar pick.
The cost of 25 guitar picks is 25c.
The cost of 25 guitar strings is 25(c + $1).
The total cost is 25c + 25(c + $1) = $40.
25c + 25c + 25 = $40
50c + 25 = $40
50c = $40 - $25
50c = $15
c = $15 / 50
c = $<<15/50=0.3>>0.3
Since one guitar string costs c + $1, then one guitar string costs $0.3 + $1 = $<<0.3+1=1.3>>1.3. Answer: \boxed{1.3}.