Answer:
i think ii first add 5x + x then you can remove the parentheses, group similar terms and add similar elements
Step-by-step explanation:
9x - 2 = 67
67 + 2 = 69
69 × 9 = 621
621 = x
T = How tall they are.
Robin = 180
His brother = x cm shorter
T = 180 - x
Answer:
Step-by-step explanation:
If you have a square of side
, its diagonal would be
, and its area 
If the big square has a area of 900, this implies that its side is
, so the two diagonal of squares 2 and 4 added together would be
, therefore one diagonal wold be
. and its side
. The area (of one square) is 
finally the two areas combined (squares 2 and 4) would be 225
Answer:
Refractive index of a medium depends upon the refractive index of the surroundings