B : subtractions
because first of all is What is inside the arc
Answer:
y = -11/4 (x − h)² + k
Step-by-step explanation:
Vertex form of a parabola is:
y = a (x − h)² + k
where (h, k) is the vertex.
Given that the vertex is (-3, 28):
y = a (x + 3)² + 28
Given that a point on the curve is (-5, 17):
17 = a (-5 + 3)² + 28
-11 = 4a
a = -11/4
y = -11/4 (x − h)² + k
The formula for the axis of symmetry (AOS) is -b/2a.
The 'a' and 'b' values can be derived from examining the standard form of the quadratic,
ax^2+bx+c
In this scenario,
a=5
b=40
Now plug in the values.
-b/2a
-40/2(5)
-40/10
-4
Remember that "-4" is not your answer. Since the AOS is a vertical line of symmetry of any even degree polynomial, your answer would be<u> </u><u>x = - 4
</u><u /><em />I hope this helped. Thank you<u>
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Perimeter is the sum of all outside dimensions.
Solve for x first:
12 + x+7 + x+2 + 5 + x +4 + x + 4 = 42
Combine like terms:
4x + 34 = 42
Subtract 34 from both sides:
4x = 8
Divide both sides by 4:
X = 2
Now solve for EF by replacing x:
EF =. X + 7 = 2 + 7 = 9 feet.
7 / 12 = 0.583333333
Divide them all to see which one equals 0.583333333.
A.
8 / 13 = 0.615384615
B.
10 / 15 = 0.666666667
C.
14 / 19 = 0.736842105
D.
21 / 36 = 0.583333333
Therefore, your answer is D.