I do not know if he is OK or not.....probably just burned out. BUT , when you do not sign on for a while, your account listing gets removed from the active list and does not appear in the listings unless yo do what Guest above did to refresh the list........
0 1 81 11 361 441 841 961 out of 32 <======== you can finish
See image below....
Area of the triangle on the right is 1/2 b h === 1/2 (8 tan 45)(8)
there are TWO of these triangles that make the larger isosceles right triangle .
So the total area is 2 * (1/2)(8 tan 45)(8) units2 <=========== You can finish
Distance from 0,0 to 15,9 is the radius = sqrt (15^2 + 9^2) = sqrt306
x^2 + y^2 = 306 is your circle
(10-4i)(4-5i)+(-15+20i) =
40 - 50i -16i + 20i^2 - 15 + 20i collect like terms ( note that i^2 = -1 so + 20 i^2 = -20)
5 -46i
(5x) = 100 square both sides
(5x)2 == 52x = 1002 = 10 000
(94+89+88+92+85+ x) / 6 = 90 Just solve for 'x'
3x^2-24x+72
3 ( x^2 -8x) + 72
3 (x-4)^2 + 72 -48
3 (x-4)^2 + 24 <====== you can finish
3^(2n) + 4
You have the first three then comes sqrt 250 sqrt 1250 sqrt 6250 sqrt 31250 <===== simplify as needed
