A family spends 1/10 on housing 1/4 for food and clothing 1/5 for general expensive and 2/15 for entertainment. What fractional part of their income is spent on these items altogether

What is the value of the digit 1 in the number 13?

Need on this one asap im almost done with this subject

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