Answer:
first one
Step-by-step explanation:
48
21 white tiles = 63 cm2
total number is 144
144-63 = 81
81/3 = 27
so 27 black tiles
21+27 = 48 total.
The answer I believe is 1/t(x^2-3)
I cant type the crippled check mark symbol
b=3
3×3+5=14
That is how i figure it out
35
5²=25
2x5=10
25+10=35
