Step-by-step explanation:
look at the picture !
she has to paint actually 6 rectangles :
the 3 tops of the 3 stairs.
and the 3 vertical front boards (the front of each step of the stairs).
what is the area of these rectangles ? summing up all 6 - that is the surface area to be painted.
each top rectangle is clearly
82×19 (19 cm deep) = 1558 cm²
each front board is
82×12 (12 cm high) = 984 cm²
so, in total we have
3×1558 + 3×984 = 4674 + 2952 = 7626 cm²
as surface area to be painted.
X is side to side and Y is up and down. Hope this helps.
Answer:
28
I'm not fully sure
Step-by-step explanation:
(m^2-5m+9)^2
9^2(9x2)= 18
m^2-5m+18
2x-5= 10( need to find a way to remove the m)
10+18=28
the way I solved it is confusing
A. {9,10,11,12}
9 and 10 are elements of set A but 11 and 12 aren't elements of A.
Subsets of A
{ } {1} {2} {3} {4} {5} {6} {7 } {8} { 9} {10}
{1,2} {1,3} {1,4} {1,5} {1,6} {1,7} {1,8} {1,9} {1,10} {1,2,3} {1,2,4} {1,2,5}........ you can write like this using all the elements of A
Answer:
A
Step-by-step explanation:
7/8-1/4=5/8
pls mark me brainliest
