29.10 for the first question radius
Answer:
x = 
Step-by-step explanation:
Given
3x - 
= - 
Multiply through by 10, the lcm of 5 and 2 to clear the fractions
30x - 8 = - 5 ( add 8 to both sides )
30x = 3 ( divide both sides by 30 )
x = 
=
Answer:
x=-3 10/16
Step-by-step explanation:
5x-9-21x-42=25 (opening parenthesis)
-16x-33=25
16x+58=0
x=-58/16=-3 10/16
A=1/10, b=1/12, c=1/15 (these are the rates for each worker...)
1.)
2(1/10)+4(1/12)+t/15=1
1/5+1/3+t/15=1
(3+5+t)/15=1
3+5+t=15
8+t=15
t=7
So it would take c 7 hours to finish the job.
2.)
1/40-1/60
(3-2)/120
1/120
The drain rate is 1/60. So you will need to find t when the tank is empty, while starting at 2/3 capacity...
2/3-t/60=0
(40-t)/60=0
40-t=0
t=40
It would take 40 minutes to empty the tank when it is 2/3 full.
Answer:
50 miles
Step-by-step explanation:
60 divided by 30 = 5
5 miles = 10% of the trip
40% of the trip left to go
40% = 20 miles (5 x 4)
30 + 20 = 50
hope this helps!
