For what value of the constant K does the equation 2x + Kx = 3 have one solution?

2

1

For what value of the consatnt K does the equation Kx2 + 2x = 1 have two real solutions?

3

1

For what value of the constant K does the system of equations 2x - y = 4 and 6x - 3y = 3K have an infinite number of solutions?

4

1

Find M so that the lines with equations -2x + My = 5 and 4y + x = -9 are perpendicular.

5

1

John's annual salary after a raise of 15% is $45,000. What was his salary before the raise?

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