X and y are books
x is fiction
y=nonifiction
x+y=36
x=12+y
12+y+y=26
2y+12=26
minus 12
2y=14
divide 2
y=7
sub
x=12+y
x=12+7
x=19
nonfiction=7
1) surface area = 18m^2 * pi * 26m = <span>8424pi m^2</span>
Answer:
2x+12
Step-by-step explanation:
We have a square patio, then each side of the patio has the same lengt. As we know the perimeter of a square is the sum of all sides. Then to know the length of the patio we just need to divide by 4 the perimeter.

Then each side of the square patio has a length of 2x+12
Answer:
25
Step-by-step explanation:
25 has 2 digits
25 is less than 30
25 is odd
2+5 = 7
It is 25.