In a fish tank 7/10 of the fish have red stripes on them if 21 on the fish have a stripes on them how many total fish are there in the tank?

Pls me this is due today and i need i will make brainliest if you me answer correctly and i will report if you try to give me a dumb answer.

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?