Answer:
Wouldn't it be 45 minutes as well?
Step-by-step explanation:
If you think about it in a real life scenario, if one person does the job and then another person does the same job at the same speed wouldn't it be the same time? But if its not i think it would be 15 minutes because 45-30 = 15
Answer:
B. 31r − 71 is the answer!
Answer:

Step-by-step explanation:
step 1
Convert mixed numbers to an improper fractions


step 2
we know that
A teacher reviews 9/2 papers per hour
using proportion
Find how many papers will the teacher review in 19/3 hours
Let
x-----> the number of papers



Convert to mixed numbers

The answer is 3214
3 is equivelant to 0.74
2 is equivelant to 0.88...
1 is equivelant to 7
4 is equivelant to 8
Pictures listed in order... from A-C