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contminecraft10
27.01.2020 •
Mathematics
Write a function rule for the area of a rectangle whose length is 7 ft more than its width. what is the area of the rectangle when it’s width is 8ft?
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Ответ:
A = 120 sq ft, when it’s width is 8 ft.
Step-by-step explanation:
Here, let us assume the width of the rectangle = w
So, the length here = Width + 7 ft = (w + 7) ft
Now, AREA of a RECTANGLE = Length x Width
Substituting here the values of length and width, we get:
A = (w) x (w + 7)![= w^2 + 7 w](/tpl/images/0473/8507/e97fa.png)
The above function is the rule for the area of a rectangle.
Given: w = 8 ft
To find the area: put w = 8 in![A = w^2 + 7w](/tpl/images/0473/8507/00932.png)
We get: A = 8² + 7(8)
= 64 + 56 = 120
or, A = 120 sq ft.
Hence, area = 120 sq ft, when it’s width is 8 ft.
Ответ:
A
Step-by-step explanation:
To solve this I first solved the equation for how many rabbits there would be after 1 year
1000+ .40×(1400)
This is going to give me the number of rabbits at first, + 40% of the initial population.
After the first year there would be 1400 rabbits.
While choice C does equal 1400, this equation only gives you the population increase for 1 year. Answer A allows you to find the population for any year.