1. charles's age is 7 more than 3 times norman's
age, n. write an expression for charles's age.

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Find the power set of each of these sets, where a and b are distinct elements. a) {a} b) {a, b} c) {1, 2, 3, 4} show steps

Why is causation so much more difficult to prove than correlation?