Question 5

1.8

To evaluate the expression 6x - 2y for the given values of x and y, substitute x = 0.8 and y = 1.5 into the expression. This results in 6(0.8) - 2(1.5) = 4.8 - 3 = 1.8.

A) 2.3

Option A is incorrect because substituting the values of x and y into the expression does not yield 2.3. Instead, the calculations show that the result is 1.8, demonstrating that this option is not valid.

B) 2

Option B is also incorrect. The calculation of 6(0.8) - 2(1.5) does not simplify to 2, as the actual result is 1.8. Thus, this choice does not match the evaluated expression.

C) 1.8

Option C is correct. When substituting x = 0.8 and y = 1.5 into the expression 6x - 2y, we get 6(0.8) - 2(1.5) = 4.8 - 3 = 1.8, matching this option perfectly.

D) 1.3

Option D is incorrect. The calculation of the expression does not yield 1.3. Instead, the correct evaluation shows that the result is 1.8, thus making this option invalid.

E) None of the above

Option E is incorrect as well because the correct value of 1.8 is provided in option C, which means that "none of the above" does not apply.

Conclusion

The correct answer is 1.8, as it is the result obtained from substituting the values of x and y into the expression 6x - 2y. All other options either misrepresent the result or do not align with the calculations performed, confirming that option C is the only valid selection.