Replace each verbal statement using variable expressions:
A: if ten times a number is reduced by the same number, the result must be nime times the number
B: increasing a number by itself and 5 is the same as doubling the number and adding 5
C: the perimeter P of a rectangle is twice the length A of a side added to twice the lenght B of an adjacent side
D: the profit P is the difference betweeen the revenue R and the total costs C
E: the area A of a rhombus equals one-half the product of ist diagonals D1 and D2

A: 10n − n = 9n; B: n + n + 5 = 2n + 5; C: P = 2A + 2B;
D: P = R − C; E: A = D1·D2 / 2

A:	if ten times a number is reduced by the same number, the result must be nime times the number
B:	increasing a number by itself and 5 is the same as doubling the number and adding 5
C:	the perimeter P of a rectangle is twice the length A of a side added to twice the lenght B of an adjacent side
D:	the profit P is the difference betweeen the revenue R and the total costs C
E:	the area A of a rhombus equals one-half the product of ist diagonals D1 and D2