Can anyone help me on this

The verbal translation for the difference of m and 7 increased by 15

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

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27