First we need to find out how much weight they were originally carrying.
7.8 kg x 3 climbers
=23.4 kg
Now we can find out how much each person should carry after a fourth person joins the group.
23.4 kg/4 climbers
=5.85 kg
Each climber carried 5.85 kg
16, first you need to add on the four he lost to the 18 he ended with.
ANSWER
65
EXPLANATION
This will form a sequence with first term:
with constant difference d=6 and last term
The last term is a term in the sequence, therefore;
Simplify the LHS
Divide both sides by 6.
Therefore
Hence there are 65 multiples of 6.
Bob can shingle 1 roof for every 10 hours of work. (1/10)James can shingle 1 roof for every 16 hours of work. (1/16)To find out what they can do together, you must add their rates of work together.This will be the number to find how fast they can shingle 1 roof in t amount of hours (1/t) 1/10 + 1/16 = 1/t 8/80 + 5/80 = 1/t 13/80 = 1/t Cross multiply 13(t) = 1(80) 13t = 80 t = 6.15 It would take them 6.15 hours to complete the roof together.
Answer:
6
Step-by-step explanation:
30+60=90
180-90=90
90 divided by 12 is 7.5 so im assuming its 6
