find the measure of ∠x.
a) 26°
b) 30°
c) 36°
d) 39°
e) 42°

Step-by-step explanation:

The sum of the exterior angles of any polygon is 360 degrees.  So first we need to find the measure of the exterior angle to x.

360 - 144 - 72 = 144

144 and x are supplementary, so they add up to 180.  That means that

144 + x = 180 so

x = 36

Choice C is the one you want.

-10i^2-4i

step-by-step explanation:

evaluate for p=2,q=5i

(2−4)(2+5i)i

(2−4)(2+5i)i

=−10i2−4i

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.