What is the value of 3

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.

Use order of operations to solve. (24 divided 3) + 3.5 + 3 power of 3

Since we have computer algebra systems that can solve polynomial division problems for us, why is it necessary to learn how to do these things by hand?