What is the value of x

If square root x = -7, then x= -49 true or false

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

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11