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Joe has a collection of nickels and dimes that is worth 6.05 If the number of dimes was doubled and the number of nickels was decreased by 10 the value of the coins would be 9.85 How many dimes?
Wiki User
∙ 8y ago
dime = 0.10
nickle = 0.05
(1) 0.10d + 0.05n = 6.05
(2) 2x 0.10d + 0.05(n-10)=9.85
0.20d + 0.05n - 0.5 = 9.85
0.20d + 0.05n = 10.35
To make things easy, I'll multiply everything by 100
(1) 10d + 5n = 605
(2) 20d + 5n = 1035
(1) 5n = 605 - 10d
n = 121 - 2d
(2) 5n = 1035 - 20d
n = 207 - 4d
121 - 2d = 207 - 4d
121 + 2d = 207
2d = 86
d = 43
43 Dimes
Wiki User
∙ 8y ago
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What number can be decreased by six and the results doubled to produce 24?
How about: 18-6 = 12 and 2*12 = 24
What is an algebrain expression a number doubled by 2?
Assuming that the phrase "doubled by 2" is tautological, the expression for a number multiplied by 2 (or a number doubled) is 2n.
How does the total number change when the number is doubled?
If the number is doubles its total is doubled since its total is itself!
How tall is a stack of nickels?
It depends on the number of nickels.
What is the equation for a number doubled?
2n
How many dimes does Joe have if a collection of nickels and dimes that is worth 6.05 If the number of dimes was doubled and the number of nickels was decreased by 10 the value coins would be 9.85?
Ten it each group.
How much can you get for nickel collection?
That depends on the number of nickels, their dates, and their condition.
What number can be decreased by six and the results doubled to produce 24?
How about: 18-6 = 12 and 2*12 = 24
Two fewer than a number doubled is the same as the number decreased by 38 Find the number?
2x - 2 = x - 38Subtract x from each side:x - 2 = -38Add 2 to each side:x = -36
A stack of nickels and dimes is worth 2.55 find the number of nickels if the number of dimes is 12 less than twice the number of nickels how many nickels are there?
There are fifteen (15) nickels.
What is an algebrain expression a number doubled by 2?
Assuming that the phrase "doubled by 2" is tautological, the expression for a number multiplied by 2 (or a number doubled) is 2n.
How does the total number change when the number is doubled?
If the number is doubles its total is doubled since its total is itself!
A stack of nickels and dimes is worth 2.55 Find the number of nickels if the number of dimes is12 less than twice the number of nickels?
apples
What is one third of an unknown number doubled?
one third of an unknown number doubled is...
How tall is a stack of nickels?
It depends on the number of nickels.
What is a number decreased by 4?
A number decreased by 4 is n-4
What is the answer if a natural number is doubled when added to its reciprocal?
A natural number is doubled when added to its reciprocal. Find that number!
