kayleewoodard
12.12.2020 •
Mathematics
Find the value of a?
A) 3
B) 4
C) 6
D) 9
Solved
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Ответ:
Step-by-step explanation:
n=q-9
5n+25q=465, using n from above this becomes
5(q-9)+25q=465
5q-45+25q=465
30q-45=465
30q=510
q=17, and since n=q-9
n=17-9
n=8
So Melinda has 8 nickels and 17 quarters.