How do I work 2s^3-4r^2 if s=5 and r=1?
I would assume you just replace all the r's with 1, and all the s's with 5:
2(5^3)-4(1^2)
= 2(125)-4(1)
= 250-4
= 251
Just plug and chug. I assume the arithmetic does not cause problems...
that is what I thought thank you!
To evaluate the expression 2s^3-4r^2, where s=5 and r=1, you can substitute the given values into the expression and then simplify it.
Step 1: Substitute the values:
Replace s with 5 and r with 1 in the expression:
2(5)^3 - 4(1)^2
Step 2: Simplify the expression:
Evaluate the exponentials first:
2(125) - 4(1)
Next, perform the multiplication:
250 - 4
Finally, subtract:
246
Therefore, when s=5 and r=1, the value of the expression 2s^3-4r^2 is 246.