What is the solution of the system?
5x - y = -7
3x - y = -2
a) (-2.5, -5.5)
b) (-2.5, 11)
c) (5, 2.5)
d) (2.5, 5.5)
4x +3y = 12
7x + 5y = 26
a) (18, 20)
b) (18,-20)
c) (-20, 18)
d) (20,18)

the correct answer is the second option

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.