1.7 is the answer to the question
30°C = 86°F
30°C is higher :)
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.
Answer:
∠3 = 55° {being vertically opposite angles}
∠7 = ∠3 = 55° {being corresponding angles}
