Determine the open intervals on which the graph of f(x)=7x^2 +x-2 is concave upward or downward

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

What is the measure of the smallest angle in the diagram? 15 29 32 45

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x