Answer:
$15
Step-by-step explanation:
You take 50% off of $30, which is 15. You can also think of it as 50% is 1/2. So 1/2 of 30 is 15
Answer:
the answer is 3n
Step-by-step explanation:
correct
3d+ 3s = $21 because they bought three drinks and three snacks
Answer: option D
Step-by-step explanation:
The formulae for standard error = standard deviation/√n
But population standard deviation = 1.8 and sample size = n = 81
Standard error = 1.8/√81 = 1.8/9 = 0.2
