What are surds? how many types of surds are there?​

The angles below are supplementary. what is the value of x? a pair of supplementary angles is shown. one angle measures 7x + 33, and the other angle measures 70. 5.3 8.14 11 14.7

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2