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adell [148]
3 years ago
14

A piggy bank contains $5.60 in nickels and dimes. The number of nickels is 8 less than 3 times the dimes. How many nickels and d

imes are there in the piggy bank? The piggy bank has nickels and dimes. NextReset
Mathematics
2 answers:
Fantom [35]3 years ago
8 0
There are 24 dimes and 64 nickles
Vlad1618 [11]3 years ago
3 0

Answer:

64 nickels and 24 dimes

Step-by-step explanation:

Let there be x nickels and y dimes

The number of nickels is 8 less than 3 times the dimes

i.e. x = 3y-8

Value of the coins = 5x+10y

= 560 cents (given)

Substitute x value in the second equation

5(3y-8)+10y = 560\\25y = 600\\y =24\\

Substitute in

x = 3y-8\\=64

There are 64 nickels and 24 dimes.

You might be interested in
What is the number three and eight tenths as a decimal.
natali 33 [55]

Answer:

3.8

Step-by-step explanation:

3 8/10 can be written as 3.xx because all we have to do is 8 divided by 10 which equals .8 so 3+.8=3.8

7 0
3 years ago
Write an expression to represent the phrase, "6 of one thing plus half a dozen of the other"
yawa3891 [41]
'of' means multiply
half a dozen means 12/2=6

6 of one thing means 6 times x
plus  means ad
half a dozen of another mean 6 times y

they are added

6x+6y


2 variables
it says 'of the other' so they are diferent
4 0
3 years ago
Solve.
artcher [175]

Answer:

x=1

Step-by-step explanation:

you would substitute the first equation in for the y in the second equation

x + 2x+3 =6

then you would combine the x's

3x +3 = 6

Then you would move the 3 to the other side with the six

3x =6-3       3x = 3

Then finally you would divide the three

3x/3 = 3/3   x=1

6 0
3 years ago
I need help with this problem
erik [133]
I think the answer is 400 square centimetres
8 0
3 years ago
Need help please and thank you?!
PilotLPTM [1.2K]

Answer:

3. 50.27 inches squared

4. 113.1 km squared

Step-by-step explanation:

3. A=πr^2

π*16

4. A=πr^2

π*36

Have a good day :)

7 0
3 years ago
Read 2 more answers
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