8k − h^3 + 8y ÷ r
when k=4, h=2, y=5, and r=8
71.625
31
29
14.625
To find the value of the expression when k=4, h=2, y=5, and r=8, substitute these values into the expression:
8k − h^3 + 8y ÷ r
= 8(4) − (2^3) + 8(5) ÷ 8
= 32 - 8 + 40 ÷ 8
= 32 - 8 + 5
= 24 + 5
= 29
Therefore, the value of the expression when k=4, h=2, y=5, and r=8 is 29. Answer: 29.