I believe that the answer is 1/2 of a minute.
Answer:
LHS=cos^4(A/2)-sin^4(A/2)
={cos^2(A/2)}^2 -{sin^2(A/2)}^2
={cos^2(A/2) - sin^2(A/2)}{cos^2(A/2) +sin^2(A/2)}
=cosA×1
=cosA
Answer:
the first and last answer, 1 and 4
Step-by-step explanation:
Answer:
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.