Afood processor for $149.50 cash, or $5.00 down and $10.00 per month for 15 months

Can someone me and do the problem plz so i can understand it more better

Astudent survey asked: "how tall are you (in inches)? " here's the data: 67, 72, 73, 60, 65, 86, 72, 69, 74 give the five number summary. a. median: 73, mean: 70.89, iqr: 5, min: 60, max: 74 b. 60, 66, 72, 73.5, 86 c. 60, 67, 72, 73, 74 d. 0, 60, 70, 89, 74, 100

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?