How do you write the inequality for -3 and 5

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?