my son is 12 years old and his brother is 6 years time Johnson will be twice as old as his brother how old are they now ​

What is the order of operations for 2 + (3 - 9) ÷ -3 · 4 in number order 1. subtraction 2. division 3. addition 4. multiplication

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

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