Since the simplified numerator, x > 0 for all x, we have f ''(x) > 0 ⇔ x2 − 1 > 0 ⇔ |x| > your answer cannot be understood or graded. more information and f ''(x) < 0 ⇔ |x| < . thus the curve is concave upward on the intervals (−[infinity], −1) and and con

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?