Final answer:
The value of the expression 4.5(xy)−x5 when x=1/2 and y=2/3 is 23/32.
Step-by-step explanation:
To evaluate the expression 4.5(xy)−x5 using the given values x=1/2 and y=2/3, we substitute these values into the expression.
Substituting x=1/2 and y=2/3:
4.5(1/2)(2/3) - (1/2)^5
= 4.5/1 * 1/2 * 2/3 - 1/32
= 9/2 * 1/6 - 1/32
= 9/12 - 1/32
= 3/4 - 1/32
= 24/32 - 1/32
= 23/32
Therefore, the value of the expression 4.5(xy)−x5 when x=1/2 and y=2/3 is 23/32.