She invested "a" at 5% and "b" at 6%.
now, we know whatever amounts "a" and "b" are, they add up to 8000, thus
a + b = 8000.
how much is 5% of a? well, (5/100) * a, or 0.05a.
how much is 6% of b? well, (6/100) * b, or 0.06b.
After a year, their combined interest, their yield, was 455, thus, we also know that
0.05a + 0.06b = 455.
how much was invested at 6%? well, b = 8000 - a.
Answer:1/5
Step-by-step explanation:
It’s goes 1/5 per time
9514 1404 393
Answer:
- 340 quarters
- 1020 dimes
- 1031 nickels
- 2062 pennies
Step-by-step explanation:
x is the number of quarters
__
a) d = 3x . . . . . . the number of dimes is 3 times the number of quarters
b) n = d + 11 = 3x +11 . . . . there are 11 more nickels than dimes
c) p = 2n = 2(3x +11) = 6x +22 . . . . there are twice as many pennies as nickels
d) The total number of coins is ...
x + d + n + p = 4453
x + (3x) +(3x +11) +(6x +22) = 4453
13x +33 = 4453
13x = 4420
x = 4420/13 = 340 . . . . number of quarters collected
3x = 1020 . . . . . . . . . . . .number of dimes collected
1020 +11 = 1031 . . . . . . . number of nickels collected
2·1031 = 2062 . . . . . . . . number of pennies collected
There were 340 quarters, 1020 dimes, 1031 nickels, and 2062 pennies collected.
_____
<em>Check</em>
340 +1020 +1031 +2062 = 4453 . . . as required
Answer:
however the meaning of math
Step-by-step explanation:
20+20