The input nums is supposed to be an array of unique integers ranging from 1 to nums. Length (inclusive). However, there is a mistake: one of the numbers in the array is duplicated, which means another number is missing. Find and return the sum of the duplicated number and the missing number.

By what percent will the product of two numbers change, if the first number increases by 70%, while the second number decreases by 40%.

Vera is on her school's track and field team. in a practice long-jump competition against her teammates, she gets 5 points for landing over the farther line. she gets a total of 7 jumps and lands x times over the farther line and the rest of the times over the closer line. which of the following functions represents vera's total score? a. f(x)=10x b. f(x)=5x+35 c. f(x)=10x+5 d. f(x)=70-5x

Ben is interested in using a source that provides original research, current and developing trends and experts within specific fields. which source should he use?