Recall the symbol z represents the complex conjugate of z. if z=a+bi and w=c+di show that the statement is true zw=z*w

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

The square root of 9x plus 7 plus the square rot of 2x equall to 7

If y varies directly as x2 and y=6 when x=6, find the constant of variation.