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iren2701 [21]
3 years ago
15

a safe contains120 coins, the value of which is $10. If the coins consist of nickels and dimes, how many of each kind are in it

Mathematics
1 answer:
AnnyKZ [126]3 years ago
3 0
There will be 50 dimes and 100 nickles
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7 times as much as the sum of 1/3 and 4/5
Jet001 [13]
First of all, you add 1/3 and 4/5, so you get:
\frac{1}{3} +  \frac{4}{5}

To add 2 fractions, they need to have the same denominator. Since 3 and 5 don't have a common factor, so you multiply 1/3 by 5, and 4/5 by 3, so you get:
\frac{1*5}{3*5} +  \frac{4*3}{5*3}
\frac{5}{15} +  \frac{12}{15}

Now, the two fractions got the same denominator, and you can add them by adding the numerators over the same denominator. (You don't add denominators in addition) so you get:
\frac{5+12}{15}
\frac{17}{15}

That's the sum of 1/3 + 4/5.

Now, they want the sum of the 2 fractions 7 times. So you multiply 17/15 by 7. And as you know, 7 = 7/1. So you get:
\frac{17}{15} *  \frac{7}{1}

In multiplication no need to have the same denominator. You multiply nominators by nominators and denominators by denominators. So you get:
\frac{17*7}{15*1}
\frac{119}{15}

Since 119 and 15 don't have a common factor, so they can't be simplified.
So, the answer is 119/15. 

Hope this Helps! :D
7 0
3 years ago
Read 2 more answers
Greg received a gift card of $100 for a pizza restaurant. The restaurant charges $15 per pizza. Ashely received gift card of $70
777dan777 [17]
Hope this helps! Message me with any questions!

8 0
3 years ago
An infinite number of ratios are equivalent to 3:8. How
Inessa05 [86]

Answer:

See below, please!

Step-by-step explanation:

There are infinite number of ratios equivalent to 3:8 because both numbers can be multiplied by a common number or divided by a common number.

For example, 9:24 would still be equivalent to 3:8 because the common number in our case is 3. See what I mean?

Hope this helped!

3 0
3 years ago
Please help would mean a lot
jarptica [38.1K]

Answer:

1/2

Step-by-step explanation:

output devided by input

3 0
2 years ago
12 bars of chocolate costs $3.00 . What is the cost of each chocolate bar? ​
andre [41]

Answer:

$0.25

Step-by-step explanation:

Divide the cost by the amount.

\frac{3}{12}=0.25

Therefore, the cost of each chocolate bar is $0.25.

7 0
2 years ago
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