The mean age of the first 7 people to arrive at Grandma Bertha’s birthday party was 21. When Jeff arrived at the party, the mean increased to 22. Mary, who is 27, arrived next. The tenth and final person to arrive was Grandma Bertha, and the mean age increased to 28 years. How old is Grandma Bertha on this birthday?

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.

the anwser is d) 75°

step-by-step explanation:

55% are girls and 45% are boys : ) hope this

step-by-step explanation: