Answer:
Yes, this is a valid inference because she took a random sample of the neighborhood.
Step-by-step explanation:
As her survey was non bias and completely random and she found that 15% of the families would participate in the event. She claims that 15% of the neighborhood families would be expected to participate in the sports event. So, yes, this is a valid inference because she took a random sample of the neighborhood.
If you are asking to simplify, this is what I got. Hope I was able to help
You can factor this out by thinking of the factors of 56 that have a sum of -1. 7 and 8 are factors of 56 and to get a sum of -1, 8 should be negative. 7 + -8 = -1
So

factored out is (y+7x)(y-8x)
We can check this using FOIL
F = (y)(y) =

O = (y)(-8x) = -8xy
I = (7x)(y) = 7xy
L = (7x)(-8x) =


Combine like terms
Answer:
d
Step-by-step explanation:
There are only three shapes that can form tessellations: the equilateral triangle, square, and regular hexagon. Any one of these three shapes can be duplicated infinitely to fill a plane with no gaps. Many other types of tessellation are possible under different constraints.
Answer:
842 Fahrenheit, 723.15 Kelvin
Step-by-step explanation:
(450C * 9/5) + 32 = 810 + 32 = 842 Fahrenheit
450C + 273.15 = 723.15 Kelvin