Joanna has a total of 50 coins in her purse. the coins are either nickels or quarters. the total value of the coins is $7.10.

which system of equations can be used to determine the number of nickels, n, and quarters, q, that joanna has in her purse?

a. n+q+50
0.05n+0.25q=7.10

b. n+q=7.10
50n+50q=7.10

c. 0.05n+0.25q=50
n+q=7.10

d. 0.05n+ 0.25q= 7.10
50n+50q=7.10

Option A.

Step-by-step explanation:

Let

n-----> the number of nickels

q----> the number of quarters

Remember that

we know that

----> equation A

-----> equation B

using a graphing tool-----> solve the system of equations

The solution is the point (27,23)

see the attached figure

therefore

The number of nickels is 27

The number of quarters is 23

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.

answer: what is the question you're trying to ask?

step-by-step explanation: