If 1/a=1/b+1/c+1/d find c when a=2, b=3 and d=5

guys help me with this question please​

The function models the number of accidents per 50 million miles driven as a function

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path

Aschool had an election where the candidates received votes in the ratio 1: 2: 3. if the winning candidate received 210 votes, how many total people voted in the election?