Question

Layla has a jar filled with 108 coins. If the jar contains only quarters and nickels and has a value of $15.80, how many nickels are in the jar?

Answer 1

Hint:

n+d = 108
0.05n + 0.10d = 15.80

Answer 2

but how do you figure out how many of each there should be? its simple but has me confused I think im thinking about it too ,uch

Answer 3

n+d = 108

d = 108 - n

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0.05n + 0.10d = 15.80

5n + 10d = 1580

5n + 10(108-n) = 1580

solve for n

Answer 4

@jim_thompson5910 The question relates to nickels and quarters.

Answer 5

oh my bad, misread and thought it was nickels and dimes

Answer 6

n+q = 108

q = 108 - n

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0.05n + 0.25q = 15.80

5n + 25q = 1580

5n + 25(108-n) = 1580

Solve for n

Answer 7

How would I solve for N? Ive been doing this aggisntment for the past 2 hours, my brain is dead

Answer 8

5n + 25(108-n) = 1580

5n + 25(108)+25(-n) = 1580

5n + 2700-25n = 1580

-20n = 1580 - 2700

-20n = -1120

I'll let you finish

n = ???

Answer 9

56?

Answer 10

yep