2) Working alone, Rob can dig a 10 ft by 10 ft hole in ten hours. Shayna can dig the same hole in seven hours. Find how long it
would take them if they worked together.
1 answer:
rob can dig 1/10ft in one hour
Shayna can dig 1/7ft in one our
together they can dig
1/10+1/7
(7+10)/70 in one hour
17/70
in for hours they can dig
17/70×4
68/70
the left work is 2/70
in 60 minutes they can dig 17/70
1/70 work can be done in 60 minutes/17
2/70 work can be done in 60/17×2 minutes
7.088 minutes
for the entire work they take 4hours and 7 minutes
You might be interested in
It is 93 million miles away from earth. hope that helped
Answer:

Step-by-step explanation:
The quadratic formula of a quadratic equation

We have the equation:

Substitute:

Answer:
Slope: 10
Y-intercept= 30
Step-by-step explanation:
y= mx + b
m = slope
b = y-intercept
y= 10x + 30
Slope: 10
Y-intercept= 30
Answer:
95.25 calories
Step-by-step explanation:
127 x 0.25 = 31.75
127 -31.75 = 95.25
Answer: a
Step-by-step explanation: