Answer:
Step-by-step explanation:
4+2t=18
2t=14
t=7 hours
7.00 hours
They already did 4 problems and need to do 18 problems in total.
18 - 4 = 14 problems
2 problems/ per hour
14 problems/ 7 hours
It will take them 7 hours to finish. Since you said "Give your answer to two decimal places." You could write it as 7.00 hours.
Answer: D = -8
combine like terms