3x + 5y = 78
2x - y = 0
the point of intersection of the lines has an x-coordinate of
78
6
-6

Write the rational number in lowest terms 99/-15

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

Use the ratio test to determine whether ∑n=14∞n+2n! converges or diverges. (a) find the ratio of successive terms. write your answer as a fully simplified fraction. for n≥14, limn→∞∣∣∣an+1an∣∣∣=limn→∞.