What is (2x+1)+(x+36)=180 ?
2 answers:
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Answer:
- Heather's model represents the greater area.
greater.
Step-by-step explanation:
The formula for calculate the area of a rectangle is:
Where "l" is the lenght of the rectangle and "w" is the width.
The formula for calculate the area of a square is:
Where "s" is the side lenght.
In this case, knowing that Elle's model represented 20 feet by 15 feet, we can say that:
Therefore, substituting these values into the formula , we get that the area is:
Since Heather's model represented 18 ft by 18 feet, we can identify that:
Substituting this value into , we get this area:
Notice that Heather's model represents the greater area.
To calculate how much greater it is, subtract the areas. Then:
Answer:
Use the appropriate entry method for piecewise functions for the graphing calculator of interest.
Step-by-step explanation:
For Desmos, the entry looks like ...
f(x) = {x ≤ 2: -2x-1,-x+4}
_____
For a TI-84 calculator, the entry may look like ...
Y₁ = (-2X–1)(X≤2) + (-X+4)(X>2)
The symbols ≤ and > come from the TEST menu, which is the (2nd) shift of the MATH key.
Note that the function is the sum of the pieces, each piece multiplied by a test. For something like 0≤x<2, the multiplier would be a pair of tests:
... (0≤X)(X<2)
