The quadratic function f(x)= ax2 + 8x + c has a vertex at (1,9). What are the values of a and c?​

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3

The trigonometric ratios sine and secant are reciprocals of each other

If the scale factor between two circles is 2x/5y what is the ratio of their areas?