Kelly has 2 dimes as many quarters as dimes. She has 18 quarters. How many dimes does she have?

Solve |2x - 5| = 4 if anyone could , that would be great

When y’all answer can y’all explain too !

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?