Answer:
L=19.5in w=10.5in
Step-by-step explanation:
Draw a rectangle. If the length is 9 inches longer than its width, we can write the width as "w" and the length as the width + 9
Area is (width)(Length) = (width)(width+9)
W
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| | L = w+9
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A = (w+3)(w)
A = w2 + 9w = 205.
(Problem states that area is 205 sq in)
Need to solve this quadratic equation
w2 + 9y - 205 = 0
Factor:
(w - 10.51) (w + 19.51) = 0
So
w - 10.51 = 0. or. w + 19.51 = 0
Solve these and get
w = 10.51. or. w = -19.51
Only one that makes sense in real life is the positive one.
So the dimensions are
Width = 10.51 inches
Length = 19.51 inches
You would have to do length times width. So you would do 6*6 then you will get 36. After that you would want to do 36*3. You would then get 108. The answer is B. 108 ft^2.
Answer:
C
Step-by-step explanation:
slope is rise/run or y2-y1/x2-x1
We use the two points (0,1) and (2,0)
y2=0, y1=1, x2=2, x1=0
0-1=-1
2-0=2
-1/2=-1/2
This gives a slope of -1/2, Answer Choice C
If Sachiko lets x represent the length of the side of the square and she wants to find the length of the perimeter of the square, it is appropriate for her to ...
... B. Set the area equal to x², solve for x, and then multiply the value of x by 4.
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The area of a square of side length x is x·x = x². The perimeter of a square of side length x is x+x+x+x = 4·x.
Answer:
w²
(w is for whole numbers and starts from 0)
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