How can the distributive property be used to multiply numbers
1 answer:
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Answer:
see explanation
Step-by-step explanation:
(1)
Given
g(r) = (r + 14)² - 49
To obtain the zeros, let g(r) = 0 , that is
(r + 14)² - 49 = 0 ( add 49 to both sides )
(r + 14)² = 49 ( take the square root of both sides )
r + 14 = ± = ± 7 ( subtract 14 from both sides )
r = - 14 ± 7, then
r = - 14 - 7 = - 21 ← smaller r
r = - 14 + 7 = - 7 ← larger r
(2)
The equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
g(r) = (r + 14)² - 49 ← is in vertex form
with vertex = (- 14, - 49 )
Let the width be W, then the length is 4W (since the width is 1/4 the length)
The area of the original deck is
The dimensions of the new deck are :
length = 4W+6
width=W+2
so the area of the new deck is :
"<span>the area of the new rectangular deck is 68 ft2 larger than the area of the original deck</span>" means that we write the equation:
the length is
ft
Answer: width: 4, length: 16
The area of the original deck is
The dimensions of the new deck are :
length = 4W+6
width=W+2
so the area of the new deck is :
"<span>the area of the new rectangular deck is 68 ft2 larger than the area of the original deck</span>" means that we write the equation:
the length is
Answer: width: 4, length: 16