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Sergeeva-Olga [200]
3 years ago
8

a child find 29 nickels and dimes. how many dimes are there if the total value of the coins are $2.10?

Mathematics
2 answers:
AfilCa [17]3 years ago
4 0
Devide 29 by 2.10 and you get 13.8095238 then round off to 13
So there are 13 dimes and 16 nickels
To check the answer just put 13 x 10 +16 x 5 in a calculator and the answer should be 210
DaniilM [7]3 years ago
3 0
X represents nickels
y represents dimes
x+y=29
5x+10y=210
multiply the first equation by -5 (elimination method)
-5x-5y=-145
then add the two equations together
5y=65
divide 5 from both sides
y=13
13 dimes
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3 years ago
The ratio of pencils to erasers is 4:1. If there are 20 pencils, how many erasers are there.
Leokris [45]

Answer: 5 Erasers

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3 0
3 years ago
I NEED HELP PLEASE, THANKS.
saveliy_v [14]

Answer:

B. 33.7 mm; 54mm^2

Step-by-step explanation:

<em><u>To find the perimeter, use the formula:</u></em>

P = a + b + c

P = 12 + 12 + 9.7

P = 33.7

<em><u>To find area, use the formula:</u></em>

A = \frac{1}{2} bh

A = \frac{1}{2} (12)(9)

A = \frac{1}{2} (108)

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6 0
2 years ago
3х – 8y = 19<br> 3х + 5y = — 46
Vadim26 [7]

Answer:

-5

Step-by-step explanation:

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4 0
2 years ago
Olivia is making 15 bead bracelets for her friends what is the proportional relationship?
yanalaym [24]

5 minutes per bracelet.

because 15/3 = 5 mins.

To find the constant of proportionality in minutes per bracelet, divide the total time by the number of bracelets:

constant of proportionality =15/3= 5 minutes.

Now, we're going to consider an example of a proportional relationship in our everyday life: When we put gas in our car, there is a relationship between the number of gallons of fuel that we put in the tank and the amount of money we will have to pay. In other words, the more gas we put in, the more money we'll pay.

Learn more about the proportional relationships at

brainly.com/question/12242745

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6 0
2 years ago
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