Father bought x sweets.(x-4) were eaten by the children and 20 were left. How many sweets did thier father bought?

Find and simplify the difference of the golden ratio and its multiplicative inverse

Alicense plate is to consist of 44 digits followed by 55 uppercase letters. determine the number of different license plates possible if the first and second digits must be? odd, and repetition is not permitted.

Identify which functions are linear or non-linear. a. f(x) = x2 + 1 b. f(x) = 2x + 5 c. f(x) = x 2 + 3 d. f(x) = 3 x + 7 e. f(x) = 4x + 10 2 - 5