Please check again and post a new question. There are no 1975-dated Ikes.
The Mint did not strike any quarters, halves, or dollars with that date - only dual-dated 1776-1976 Bicentennial issues.
Face value only.
Check that coin again. Eisenhower was on a large dollar, and Kennedy is on the half dollar. Either way, a circulated specimen is worth face value.
No US dollar coin is dated 1975, look at the coin again and post new question.
Eisenhower was on the one dollar coin, not the half, and they're worth one dollar.
Face value only, if it is circulated. If it is uncirculated, it is approximately $2.25
One dollar.
One dollar.
The 1972-S Proof Eisenhower Dollar has a current retail value of $6.50
They're still worth a dollar.
One dollar.
Face value only.
Check that coin again. Eisenhower was on a large dollar, and Kennedy is on the half dollar. Either way, a circulated specimen is worth face value.
About $3.25.
It's still only worth 1 dollar.
One dollar.
Current value of a 1990 Eisenhower Centennial dollar is $23.00-$25.00.
No US dollar coin is dated 1975, look at the coin again and post new question.