10x-20=180 6x+8
-20 -20 104
10
10x= 160
/10 /10
x=16
To find the X intercept, replace y with 0 and solve for x:
9x + 21(0) = 16
9x = 16
x = 16/9
To find the Y intercept, replace x with 0 and solve for y:
9(0) + 21y = 16
21y = 16
y = 16/21
X-intercept is 16/9
y intercept is 16/21
Answer:
The percent of increase is 5%
Step-by-step explanation:
Given pyramid with octagonal base. Image of the pyramid attached below:
We know the formula of Lateral Area of pyramid = ![\frac{1}{2} pl](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20pl%20)
where p represent the perimeter of the octagonal base
and l represent the slant height of the pyramid.
109.9 = ![\frac{1}{2}*p*6.7](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%2Ap%2A6.7%20%20)
Solve for p
p = 32.81 cm
Perimeter of octagonal base (all sides are same) = 8*s
where s represent the side of octagon
8s = 32.81
Solve for s
s = 4.1 cm
Side of the octagon = 4.1cm (option D)