Accuplacer Practice Test

If x=3, y=-4, and z=2, what is the value of 2x-y?

1. 14

2. 6

3. -10

4. 10

The correct answer is: 10

To find the value of \(2x - y\) when \(x = 3\) and \(y = -4\), we start by substituting the given values into the expression. First, calculate \(2x\): \[ 2x = 2(3) = 6 \] Next, substitute the value of \(y\): \[ 2x - y = 6 - (-4) \] Subtracting a negative number is the same as adding its positive: \[ 6 - (-4) = 6 + 4 = 10 \] Thus, the value of \(2x - y\) is 10. This confirms that the correct answer is indeed the one that corresponds to this calculation, which is 10.