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Helga [31]
3 years ago
14

June has $1.95 in dimes and nickels. She has a total of 28 coins. How many of each type of coin does she have.

Mathematics
2 answers:
I am Lyosha [343]3 years ago
8 0

Answer:

11 dimes 17 nickels

Step-by-step explanation:

Verdich [7]3 years ago
3 0

A dime = 0.10

A nickel = 0.05

N + D = 28 coins

Rewrite this as N = 28 -D


0.10D + 0.05N = 1.95

Replace N withe the rewritten equation above:

0.10D + 0.05(28-D) = 1.95

Use the Distributive Property:

0.10D + 1.4 - 0.05D = 1.94

Add the like terms:

0.05D + 1.4 = 1.95

Subtract 1.4 from both sides:

0.05D = 0.55

Divide both sides by 0.05

D = 0.55 / 0.05

D = 11

Nickels = 28 - 11 = 17


There are 11 dimes and 17 nickels.


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Elenna [48]
A two digit number has a tens digit and a ones digit.
Let's say x = tens digit and y = ones digit

"The sum of the digits is 5"
x + y = 5

The next phrase is "the number multiplied by 3 is 42" but we need to represent the number using the digits. So they need to be multiplied first by their place value and added together. [Example: 34 = 3(10) + 4(1)]

The number is: 10x + y
3(10x + y) = 42

The system of equations: (two equations for two unknowns)
x + y = 5
30x + 3y = 42

Then you can use substitution or elimination to combine and solve.
I'll use elimination, multiply the entire top equation by -3 and add the equations together. y will cancel out

-3x - 3y = -15
30x + 3y = 42
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27x + 0 = 27
x = 1

then plug x = 1 into either equation to find y

1 + y = 5
y = 4

remember the x and y represent digits so the number xy is 14
6 0
3 years ago
Find f(2) and f(a+h) when f(x)=3x^2+2x+4
wolverine [178]
F(2) = 3(2)^2 + 2(2) + 4

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= 3(a^2 + 2ah + h^2) + 2a + 2h + 4

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4 0
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I just need the answer bru why’s it gotta Make write 20 words‍♂️ this is dumb as hell bru‍♂️
TiliK225 [7]

Answer:

11

Step-by-step explanation:

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W^?/W² = W^?-2

W^9=W^(?-2)

9=?-2

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Answer:

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Step-by-step explanation:

If you simplify you should get 2 x  +  3y −  6

4 0
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Step-by-step explanation:

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