Brandon has a cup of quarters and dimes with a total value of $3.80 . the number of quarters is 4 less than twice the number of dimes. how many quarters and how many dimes does brandon have

 The required number of quarters is 12 and that of dimes is 8.

Step-by-step explanation:  Given that Brandon has a cup of quarters and dimes with a total value of $3.80 . The number of quarters is 4 less than twice the number of dimes.

We are to find the number of quarters and dimes that Brandon has.

We know that

1 quarter = 0.25 dollar  and  1 dime = 0.10 dollar.

Let q and d represents the number of quarters and dimes respectively that Brandon has.

According to the given information, we have

and

Substituting the value of q from equation (ii) in equation (i), we get

And, from equation (ii), we get

Thus, the required number of quarters is 12 and that of dimes is 8.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers