Answer:
$1.05
Step-by-step explanation:
Let the cost of ink refill be $x
given
The pen costs 1$ more than the ink refill
Then, cost of pen in terms of x is $( x + 1)
Total cost of pen and refill in terms of x = x + x+ 1 = 2x + 1
It is also given
A pen and its ink refill together cost $\;\$1.10$
Thus,
2x + 1 = 1.10
=> 2x = 1.10 - 1 = 0.1
=> x = 0.1/2 = 0.05
Thus, cost of refill = $0.05
cost of pen = 1+ x = 1 + 0.05 = 1.05
Thus, cost of pen in $ is 1.05.
