Ankit buys a memory card costing Rs. 550. If the rate of sales tax is 5%, then find the total amount payable by him will mark u brainliest if u solve fully :)

This doesn’t make sense to me it’s supposed to be lcm ( least common multiple )

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

What is the solution to the equation below? 3/x-2+6=square root x-2 +8