X+y=3
2x-y=3
using elimination method

x = 2 , y=1

Step-by-step explanation:

to solve the equation using elimination method we say

let

x+y=3 equation 1

2x-y=3 equation 2

add all the equation together inorder to get rid of y

we have

  x + y = 3

+ 2x -y = 3

3x = 6

divide both sides by 3

3x/3 = 6/3

x = 2

substitute for x = 2 in equation 1 to get the value of y

x+y=3 equation 1

2 + y = 3

y = 3 -1

y =2

therefore the value of x and y is 2 & 1 respectively

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.

tip $2.90

total $17.40