Please help! Express the following in the formx + iy

(i)(8 + 6i) + (6 + 4i)
(ii) (9 - 3i) + (- 4 + 5i)
(iii )(2+7i)-(5+3i)
(iv)(5-i)-(6-2i)
(V) 3(4 + 6i) + 9(1 - 2i)
(vi) 3i^ * (7-4i)
( ii)(9+2i)(1+3i)
( viii)(4-i)(3+2i)
(ix)(7+3i) ^ 2
(x)(8 + 6i) (8 - 6i)
(xi)(1+2i)(3-4i)^ (5+6 )
(Xii)(3+2i)^3

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9

Given: jk ||lm prove: _2 = 27 statement justification 1. jk ||lm 1. given 2.26 = 27 3.22 = 26 2. 3. 4. _2 = 27 4. corresponding angles theorem transitive property of equality vertical angles theorem substitution property of equality

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec