Answer: Vertical Stretch
Step-by-step explanation:
Given: The cost of manufacturing x refrigerators is given by the function :
If the cost doubles fr the year 2011 owing to higher raw material prices, then we multiply the given function by 2, then we get a new function :
which represents a vertical stretch in the graph.
∵ 2 is a positive constant greater than 1 which is multiplied to the parent function f(x). So by the definition of vertical stretch the parent function will be vertically stretched .
Answer:
-764.28
Step-by-step explanation:
Given the joint cumulative distribution of X and Y as
#First find and probability distribution function ,
:
#Have determined the probability distribution unction ,, we calculate the Expectation of the random variable X:
#We then calculate :
Hence, the Var(X) is 764.28
Answer:
)
Step-by-step explanation:
This system we can solve by substitution method :
y=13x-1
y=9x+4
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y=13x-1
13x-1=9x+4 (instead y in second equation we use 13x-1 and first rewrite)
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y=13x-1
13x-9x=4+1 (subtract 9x and add 1 for each side)
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y=13x-1
4x=5 (divide by 4)
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y=13x-1
(instead x in first eq we write 5/4)
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