D=2n: there are twice as many dimes as nickels.
n+d+q=52: a total of 52 coins, using d from above in this gives you:
n+2n+q=52 combine like terms on left side
3n+q=52 subtract 3n from both sides
q=52-3n
Then you are told that the coins have a total value of $6 which is equal to 600 cents. So we can say:
25q+10d+5n=600 divide all terms by 5
5q+2d+n=120, and from earlier we saw q=52-3n and d=2n so you have:
5(52-3n)+2(2n)+n=120 expanding...
260-15n+4n+n=120 combining like terms
260-10n=120 subtract 260 from both sides
-10n=-140 divide both sides by -10
n=14, since q=52-3n and d=2n
q=(52-3(14))=52-42=10
d=2(14)=28
So there are 10 quarters, 28 dimes, and 14 nickels or as your choices put it:
q=10, d=28, n=14 (the correct answer is d.)
Answer:
hi
Step-by-step explanation:
hi how are you doing?
Given:
The number of alligators in a wildlife is given by the function
To find:
The average growth rate of change from the 4th year to the 7th year.
Solution:
We have,
For x=4, we get
For x=7, we get
Now, the average growth rate of change from the 4th year to the 7th year is
Therefore, the average growth rate of the change from the 4th year to the 7th year is 174.70 per year.
Answer:
C^2 + 14
Step-by-step explanation: