Please someone help I can’t this
2 answers:
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The relationship between space, time and velocity for a uniform motion is given by:
where
S is the distance covered
t is the time
v is the velocity
The plane in our problem has a velocity of
and so during a total time of t=4 h, the distance it covers is
therefore, 680 miles.
where
S is the distance covered
t is the time
v is the velocity
The plane in our problem has a velocity of
and so during a total time of t=4 h, the distance it covers is
therefore, 680 miles.
We define the variables of the problem:
x = expensive tea
y = less expensive tea
We write the system of equations:
7x + 4y = 6.10 * (140) = 854
x + y = 140
The system of equations is:
7x + 4y = 854
x + y = 140
Resolving we have:
x = 98
y = 42
Note: see attached image for the solution.
Answer:
They are required:
expensive tea = 98 pounds
less expensive tea = 42 pounds
x = expensive tea
y = less expensive tea
We write the system of equations:
7x + 4y = 6.10 * (140) = 854
x + y = 140
The system of equations is:
7x + 4y = 854
x + y = 140
Resolving we have:
x = 98
y = 42
Note: see attached image for the solution.
Answer:
They are required:
expensive tea = 98 pounds
less expensive tea = 42 pounds