The $\$4.55$ in carol's piggy bank consists of quarters and nickels. there are seven more nickels than quarters. how many nickels does carol have in her bank?

There are 21 nickels in carol bank

Solution:

Given that Carol's piggy bank consists of quarters and nickels

There are $ 4.55 in total

Let "n" be the number of nickels in bank

Let "q" be the number of quarters in bank

We know that,

1 quarter = $ 0.25

1 nickel = $ 0.05

Given that there are seven more nickels than quarters

Number of nickels = number of quarters + 7

n = q + 7 ---- eqn 1

From given question,

number of nickels in bank x value of 1 quarter + number of quarters in bank x value of 1 nickel = $ 4.55

Therefore from eqn 1

n = q + 7 = 14 + 7 = 21

n = 21

Thus there are 21 nickels in carol bank

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.

my answer is$ 12

step-by-step explanation:

because 15 -2=12