Answer:
68.73%
Step-by-step explanation:
We have the insurance coverage amount for men of 30 years and for women of 50 years. Therefore, to find the percentage that represents the cost of coverage of the 50-year-old woman based on the cost of coverage of the man, we need to perform the following operation:
Where:
: cost of coverage for a woman of 50 years.
: coverage cost for a 30-year-old man.
Finally represents 68.73% of
Sung drove to the mountains
s₁=speed when Sung drove to the mountains.
t=10 hour.
d=distance.
s₁=d/t
s₁=d/10 hour ⇒s₁=d/10 (1)
Sung drove home:
s₂=speed when Sung drove home.
t=7 hour
s₂=s₁+18 miles/hour
s₂=d/7 hour ⇒s₁+18 miles/h=d/7 hour ⇒ s₁+18=d/7 (2)
Whit the equations (1) and (2) make a system of equations:
s₁=d/10
s₁+18=d/7
we can solve this system of equations by substitution method.
d/10+18=d/7
least common multiple=70
7d+1260=10d
7d-10d=-1260
-3d=-1260
d=-1260/-3=420
Answer: distance= 420 miles.
