# Posts by Aldwin

Total # Posts: 11

Math
The coordinates of the end-points of a line segment PQ are P(3,7) and Q(11,-6). Find the coordinates of the point R on the y-axis such that PR = QR. Please include the workings, as I would like to be able to perform these problems unassisted in the future (I just have trouble ...

calculus
Height = -4.9t^2 + 120t d(height)/dt = -9.8t +120 when t=5 velocity = -9.8(25)+120 = -120 m/s

math
what is the square of 65

mr kumar lives in the eastern part of spore . he visits his aged parents , who lives 36 km away , every weekend he finds that is he increases the average speed of his vehicle by 12km/h, he could save 9 minutes of his travelling time. find the speed at which he travels before ...

Meiling and meimei divide \$69 to 2 shares. 3/4 meiling's share is equal to 2/5 of meimei's share. how much do they each get

algebra
if a piece of wood is 2 cm longer than a second piece, and 3/4 of the second piece is equal to 3/5 of the first, what is the length of the second piece?

SCIENCE
THX

SCIENCE
How up-welling affect ocean life? How currents affect climate and weather?