The number of values of k for which the linear equation 4x ky 2z=0;kx 4y z=0; 2x 2y z=0 possess a non-zero solution is: 1. 1 2. Zero 3. 3 4. 2.

Three coins are flipped. what is the probability that there will be at least two tails?

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Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.