Answer:
2 days
Step-by-step explanation:
Understanding :
- Number of men is inversely proportional to the number of days taken to complete a job
- 6 men take 5 days to complete 1
- Now the number of men is 15
Solving :
- Rate of change of men ∝ 1/Rate of change of days
- 15/6 ∝ 1/(d/5)
- 2.5 = 5/d
- d = 2 days
S=sullivan's age
d=daughter's age
in 3 years time (s+3 and d+3)
sulivan is 3 times as old as daughter
s+3=3(d+3)
6 years ago (s-6 and d-6)
he was 6 times as old
s-6=6(d-6)
expand
s+3=3d+9
s-6=6d-36
for 2nd equation, add 6 to both sides
s=6d-30
sub 6d+30 for s in other equation
6d-30+3=3d+9
6d-27=3d+9
minus 3d both sides
3d-27=9
add 27 both sides
3d=36
divide both sides by 3
d=12
sub back
s=6d-30
s=6(12)-30
s=72-30
s=42
Mr. Sullivan is 42 now
Daughter is 12 now
Answer:
Step-by-step explanation:
r(x)= (x-3)(x+5)
= x²+5x-3x-15
=x²+2x-15
Answer:
c if i'm correct but its possible that its c
Step-by-step explanation:
Answer:
C. 591.5 ft^3
Step-by-step explanation:
1/2 (13*13) = 84.5
84.5*7 = 591.5
