One can know if an equation is extraneous if after plugging it in the original equation, it shows a false meaning or the value is undefined.
<h3>What is an extraneous equation?</h3>
It should be noted that an extraneous equation means a root of a transformed equation that isn't the root of the original equation due to the fact that it's excluded from the domain of the original equation.
In this case, one can know if an equation is extraneous if after plugging it in the original equation, it shows a false meaning or the value is undefined.
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Answer:
The formula to determine the length of rectangle with perimeter and width is L =
Step-by-step explanation:
Given as :
The perimeter of rectangle = P
The length of rectangle = L
The width of rectangle = W
∵ Perimeter of rectangle given as P = 2 × Length + 2 × Width
I.e P = 2 L + 2 W
Or, 2 L = P - 2 W
∴ L =
Hence The formula to determine the length of rectangle with perimeter and width is L =
Answer
For the first one your equation is h(d)=3/7d+5
If d represents the number of days and the question is wanting to know the height after 1 week (7 days) then you would get this equation once 7 is in the place of d
h(d)=3/7(7)+5
When solved you answer is 8 inch.
For the second one your equation is f(x)=75x+250
If x represents the number of weeks and the question is asking how much money Sam will have after 12 weeks then you will get this equation once putting in 12
f(x)=75(12)+250
Once solved you will get the answer $1150
Hope this helps! :)
Customer have to drive 100 miles for cost to be equal to $140
<u>Solution:</u>
Given function is as follows
C = 120 + 0.20m
Where "C" represents cost in dollar of renting a car and "m" represents number of miles.
If we see the given equation, we can say that fixed cost is 120 and variable cost is 0.20m which is dependent on number of miles car is driven.
We need to calculate number of miles so that total cost that is C = $140
On substituting C = $140 in given function, we get
140 = 120 + 0.20m
On Solving above equation for m we get
140 – 120 = 0.20m
=> 20 = 0.20m
=> 
Hence customer have to drive 100 miles for cost to be equal to $140.