ASAP help . I will give brainlesst answer. 10 points. please

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3