Hiện nay hai kim đồng hồ chỉ 10 giờ . Sau ít nhất bao lâu thì hai kim đồng hồ nằm đối diện nhau trên một đường thẳng

Y=4x^2+x-1 solve using quadratic formula

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22