The sum of ages of Cyril and Alex is 50 years. In five years time, the age of Alex will be four times the age of Cyril now. How old is each boy​

Step-by-step explanation:

Let Cyril = C

Let Alex = A

A + C = 50                (1)

A+5 = 4*C                 (2)

Solve (1) for A

A + C = 50                  Solve for A

A + C-C = 50 - C

A = 50 - C

Substitute A into (2)

50 - C + 5 = 4C         Add C to Both sides

50 + 5 = 4C + C        Combine

55 = 5C                     Divide by 5

55/5 = 5C/5

C = 11

A + C = 50               Substitute for C

A + 11 = 50               Subtract 11 from both sides

A = 50 - 11

A = 39

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.

their is no graph showing

step-by-step explanation: