<u>Given:</u>
A square pyramid with a base edge length of 8 m and a slant height of 12 m.
<u>To find:</u>
The height of the pyramid.
<u>Solution:</u>
A right-angled triangle can be formed with the slant height, the height, and half the length of the base edge.
The slant height of the pyramid is 12 m long and is the hypotenuse of the right-angled triangle.
Assume the height of the pyramid is x and half the length of the base edge is
m.
According to the Pythagorean theorem, the square of the hypotenuse will be equal to the sum of the squares of the other two sides.
The hypotenuse measures 12 m while the other two sides measure 4 m and x m each.
![12^{2} = 4^{2} +x^{2} .](https://tex.z-dn.net/?f=12%5E%7B2%7D%20%3D%204%5E%7B2%7D%20%2Bx%5E%7B2%7D%20.)
![x^{2} = 12^{2} - 4^{2} = 144-16=128.](https://tex.z-dn.net/?f=x%5E%7B2%7D%20%3D%2012%5E%7B2%7D%20-%204%5E%7B2%7D%20%3D%20144-16%3D128.)
m.
The height of the square-based pyramid is 11.313 m.
We are asked to transform the equation <span>3x^2+3x+2y=0 into the standard form by applying the technique of completing the square .
</span><span>3(x^2+x +1/4) =-2y + 3/4
</span>3 (x +1/2)^2 = -2 (y -3/8)
-3/2 (x +1/2)^2 = (y -3/8)
this follows the standard from <span>y-b=A(x-a)^2</span>
Answer:
B. The maximum occurs at the function's x-intercept.
Step-by-step explanation:
Given table:
![\large\begin{array}{| c | c | c | c | c | c | c |}\cline{1-7} x & -5 & -4 & -3 & -2 & -1 & 0\\\cline{1-7} g(x) & -1 & 0 & -1 & -4 & -9 & -16\\\cline{1-7}\end{array}](https://tex.z-dn.net/?f=%5Clarge%5Cbegin%7Barray%7D%7B%7C%20c%20%7C%20c%20%7C%20c%20%7C%20c%20%7C%20c%20%7C%20c%20%7C%20c%20%7C%7D%5Ccline%7B1-7%7D%20x%20%26%20-5%20%26%20-4%20%26%20-3%20%26%20-2%20%26%20-1%20%26%200%5C%5C%5Ccline%7B1-7%7D%20g%28x%29%20%26%20-1%20%26%200%20%26%20-1%20%26%20-4%20%26%20-9%20%26%20-16%5C%5C%5Ccline%7B1-7%7D%5Cend%7Barray%7D)
From inspection of the table, we can see that:
and![g(-3) = -1](https://tex.z-dn.net/?f=g%28-3%29%20%3D%20-1)
This indicates <u>symmetry</u>.
The line of symmetry is the mid-point between the two x-values.
Therefore, the <u>line of symmetry</u> is x = -4
The vertex (minima/maxima) is on the line of symmetry, therefore the vertex is at (-4, 0). As the function decreases as x → 0, the vertex is a <u>maximum</u>.
As the y-value of the vertex is 0, the maximum occurs at the function's <u>x-intercept</u>.
2(4-16) - (-30)
= 2(-12) -(-30)
= 24 - (-30) ....Error right here....a negative multiplies a positive = negative (= -24 + 30)
= 24 + 30
= 54
Correct:
2(4-16) - (-30)
= 2(-12) -(-30)
= -24 - (-30)
= -24 + 30
= 6