What is the y-intercept of the graph?

Aconvex octagon has interior angles that measures 73 degrees, 172 degrees, 132 degrees, 59 degrees, 154 degrees, 163 degrees, x degrees, 2x degrees find the value of the missing angles

Find the balance at the end of 4 years if 1000 is deposited at the rate of

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?