Cho v=(-2;1) và đường thẳng (d):2x-y-1=0. Ảnh của (d) qua T. là (d') có dạng A. 2x - y+4=0.
B. x - y +2 = 0.
C. 2x+y+4=0.
D. 2x - y-4=0.

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

The volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of its original volume

Yvaries inversely as x. y =12 when x=5. find y when x=4