Answer:
78 degrees
Step-by-step explanation:
If you look at it, 2 of the angels are the same- those angels are A and B- the angel we are looking for. Angel A is 78 degrees and if angel A and angel B are equal then angel B is also 78 degrees.
(8x-5)(2x+1)
Check: 16x^2+8x-10x-5
16x^2-2x-5
Im not an expert or anything, but i think for the innequality, i would say

as far as the amount of people she can invite, do 500-100=400 because of the setup fee, then, to find how many people she can invite. 400÷6.50 which leaves you with the highest amount of people she can invite without going over budget, as 61.
I don't know how to solve 11 but I guess I can solve 12 so I think those are the answers:
12.
(4, 53)
(5, 85)
Answer: 40 5/8
Step-by-step explanation:
To find the volume, you need to multiply the length, width, and height.
6 1/2 • 2 1/2 • 2 1/2 = 40 5/8
Hope this helps!