CAN YOU PLZ HELP ME ITS DUE LATER TODAY

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

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?