Astudent correctly answered 80% of the 2o questions on the test how many questions did the student answer correctly

Which number produces a rationale number when multiplied by 1/5

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

10x − 5y + 14 = 0 whats the answer pls