Answer:
1/7 + r = 1/3
Step-by-step explanation:
Rocco takes 7 hours to do the job.
In 1 hour, Rocco does 1/7 of the job.
Rocco's rate is 1/7 job per hour.
It takes Giulia x hours to do the job.
In 1 hour, Giulia does 1/x of the job.
Let r = 1/x. Giulia's rate is r part of the job per hour.
Together, Rocco and Giulia take 3 hours to do the job.
In 1 hour, Rocco and Giulia do 1/3 of the job.
Together, their rate is 1/3 of the job per hour.
1/7 + r = 1/3
the answer would be C
because it is taking the total hours ( x) and subtracting 1 ( the first hour that cost $7
and then multiplying x by the $5 per minute and then adding the $7 for the first hour
Answer:
x=5
Step-by-step explanation:
0.02x+0.7=0.8
0.02x=0.8-0.7
0.02x=0.1
x=0.1/0.02
x=5
Solve for x: 3x − 24 = 81
Add 24
3x = 105
Divide by 3
x = 35
What is the ratio of dimes to pennies in a dollar0.10 : 0.01
