Area of rectangle = length x width
so width = area / length = (<span>x^2-x-72) / (x+8); after factorizing
width = (x-9)(x+8)/(x+8)
= x - 9
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I have attached a screenshot with the complete question
Part (1):We are given the prototype used for building the wall with the following dimensions:
long side = 8 in
short side = 5 in
Now, in the wall itself, we want to find the value of the length "a".
This length represents the short side in the prototype used in building the wall.
Therefore:
a = 5 in
Part (2):We are given the prototype used for building the wall with the following dimensions:
long side = 8 in
short side = 5 in
Now, in the wall itself, we want to find the value of the length "b".
This length represents the long side in the prototype used in building the wall.
Therefore:
b = 8 in
Part (3):Looking at Dakota's wall, we can note that its height is formed from three bricks each having the height "b". We have deduced previously that b = 8 in.
Therefore:
height of wall = 3 * b
height of wall = 3 * 8 = 24 in
Part (4):Looking at Dakota's wall, we can note that its length is formed from nine bricks each having a length "a". We have deduced previously that a = 5 in.
Therefore:
length of wall = 9 * a
length of wall = 9 * 5 = 45 in
Hope this helps :)
Answer:
The will be 27000 bacteria in 36 hours from the start of the experiment
Step-by-step explanation:
In the first 18 hours:
The number of bacteria grew from 30 to 900.
So it grew by a factor of 900/30 = 30.
36 hours from the start of the experiment:
That is, the next 18 hours.
It will also grow by a factor of 30.
From 900 to 900*30 = 27000
The will be 27000 bacteria in 36 hours from the start of the experiment
Answer:
Step-by-step explanation:
8*8=64
5*2=10
64*13=832
10*13=130
832-130=702cm