A²+b²=c²
39²+b²=89²
1521+b²=7921
subtract 1521 from both sides
b²=6400
so then you square both sides
√6400
80
Answer:
3x(x – 3)(x2 + 3x + 9)
Step-by-step explanation:
Because 3x4 – 81x=3x4-3x3
and the formula is
a3-b3=(a-b)(a2+ab+b2)
but since here it is 3x4 we put 3x before the formula.
Multiply it again so it equals that 310 number
I believe that once Antoine has been walking for 75 minutes his brother will habe caught up, and this would mean his brother had walked for 44 minutes
