PLZ HELP 100PTS!!!!!!!!!!!
2 answers:
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Answer:
x = $3
y = $4
Step-by-step explanation:
We need to know the prices of gravel and peas. We can find the price by using equations and graphing them.
Let X be the price of the sand
Be and the price of pea gravel
In the first purchase we have:
In the second purchase we have
Both relations represent the equation of a line. In the graphic shown, these lines are drawn. In this case the interception between both lines represents the price of each product, and the solution of the problem. You can see that the lines intersect at point (3 4). This means that the price of each bag of sand is $ 3, and the price of a bag of pea gravel is $ 4.
The formula of the kinetic energy is:
K.E =
mv²
The given are
K.E = 100 J
v = 5 m/s
Plug them in:
100 =m × (5)²
100 =m × 25
100 = 12.5m
Divide by 12.5 on either sides to isolate m
= 
12.5 and 12.5 cancels out
8 kg = m
The mass of the baseball that has a kinetic energy of 100 J and speed of 5 m/s is 8 kg
K.E =
The given are
K.E = 100 J
v = 5 m/s
Plug them in:
100 =
100 =
100 = 12.5m
Divide by 12.5 on either sides to isolate m
12.5 and 12.5 cancels out
8 kg = m
The mass of the baseball that has a kinetic energy of 100 J and speed of 5 m/s is 8 kg