Z varies directly whith x^2 and inversely with y. when x=2 and y=4, z=3.
what is the value of z when x=4 and y=9?​

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Evaluate the expression. (9 + 5)(3 + 2)0

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.