The work of a student to solve a set of equations is shown: equation a: y = 4 ? 2z equation b: 4y = 2 ? 4z step 1: ? 4(y) = ? 4(4 ? 2z) [equation a is multiplied by ? 4.] 4y = 2 ? 4z [equation b] step 2: ? 4y = 4 ? 2z [equation a in step 1 is simplified.] 4y = 2 ? 4z [equation b] step 3: 0 = 6 ? 6z [equations in step 2 are added.] step 4: 6z = 6 step 5: z = 1 in which step did the student first make an error? step 1 step 3 step 4 step 2

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.

0.02040816326

idk wbu

step-by-step explanation: