for what value of k of the pair of equations 3 X + 4 Y + 2 is equals to zero and 9 X + 12 Y + K is equals to zero represents coincident lines ​

Write two subtraction equations that are equivalent to 5 + 12 = 17.

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

In the figure below, m∠r is 60°, and m∠t is 120°. what is m∠q? a. 60° b. 30° c. 120° d. 54