Ummm I think the answer is 9
If we draw a rhombus OABC on a coordinate grid with one vertex at the point O (0,0)
and let its height be 1 then (using the Pythagoras theorem) the coordinates of the 4 points will be as follows:-
O = (0,0) , A = (1, 1), B = (sqrt2+ 1 , 1) , C = (sqrt2, 0)
Slope of the diagonal OB = 1 / (sqrt2 + 1)
Slope of the other diagonal AC = - 1 / (sqrt2 - 1)
Product of the slopes = - 1 / ( sqrt2 + 1)(sqrt2 - 1) = -1 / 1 = -1
This proves that the diagonals are perpendicular.
the answer for the following question is 7
8x^2-1+2x^3-7x^3+3x^2-1
-5x^3+11x^2-2
Answer:
x = 415.05
Step-by-step explanation:
2(x − 412) = -6.1
=> x - 412 = -6.1/2
=> x - 412 = 3.05
=> x = 3.05 + 412
=> x = 415.05
