x: x2 - 81 = 0
27 x 3 = 81
x2 = 81 Square root both sides:- x = +/- 9
The number is three.
It is: (81*9*64)+19 = 46,675
I'm assuming here that this line is a straight line. If so, it has the general equation y=mx+c (where m= the gradient/slope and c is the intercept). Substituting in the values provided in the question, we yield; 15= (9x9)+c We then solve and rearrange; 15=81+c 15-81=c -66=c. Therefore, the slope intercept is -66
Points: (2, -2) and (8, 1)Slope: 1/2
If you mean points of (055, 18) and (566, 81) then the slope works out as 9/73
It is 13x + y = 81.
81% = 81/100
81 x 81 = 6561
How about: 9 times 9 = 81 or 81 times 1 = 81
81
81 * 22 = 1,782
100x2-81
729/81 = 9
3 to the power of 4 = 81