A coin collection contains nickels and quarters. There are 30 coins in the collection. The number of quarters is 2 more than the number of nickels. How many nickels are in the collection?
A 17
B 16
C 19
D 14

The number of nickels is 8+2q (q being quarters).  so if 8+2q=42, subtract 8 from both sides.  That gives you 2q=34.  Now, divide both sides by 2.  q=17.  17 quarters .

Step-by-step explanation:

Hope This Helps!

is there answer choices?

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