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: no
Step-by-step explanation:
The length of the door frame for the model car is 12 units and point M is the midpoint which makes AM to 6 units.
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more numbers and variables.
From the diagram attached:
AE = 12
AM = ME = 12/2 = 6 (definition of midpoint)
The length of the door frame for the model car is 12 units and point M is the midpoint which makes AM to 6 units.
Find out more on equation at: brainly.com/question/2972832
#SPJ1
Answer:
27
Step-by-step explanation:
(3²)³/3³ =
3 x 3 = 9
9 x 9 x 9 = 729
3 x 3 x 3 = 27
729/27 = 27
