Select the postulate of equality or inequality that is illustrated.

if 5 = x + 2, then x + 2 = 5

addition postulate of inequality
the multiplication postulate of inequality
the symmetric postulate of equality
the transitive postulate of equality
comparison postulate
the reflexive postulate of equality
the transitive postulate of inequality

Option 3 is correct.

By symmetric postulates of equality

Step-by-step explanation:

Symmetric postulates of equality states that if one value is equal to another value, then the second value is also equal to the first value i.e,

if x =y , then y =x

Given:

If 5 =x +2

then by symmetric property of equality;  

x+2 = 5

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.