Kat has 19 coins, all quarters and dimes, that are worth a total of $4. the system of equations that can be used to find the number of quarters, q, and the number of dimes, d, she has is shown. q + d = 19 0.25q + 0.1d = 4 how many quarters does she have?

She has 14 quarters.

Step-by-step explanation:

Let q be the number of quarters and d be the number of dimes.

The given system of equations:

Multiplying equation (2) by 10 , we get

Subtract  equation (1) from  (3), we get

Hence, she has 14 quarters.

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation: