What is the standard deviation of the following data? If necessary, round your answer to two decimal places. 10, 16, 12, 15, 9, 16, 10, 17, 12, 15

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters .

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0