All categories

3 years ago

If 30 Coins In Quarters And Dimes Are Worth $4.80, How Many Of Each Coin Are There?

Mathematics

1 answer:

GREYUIT [131]3 years ago

3 0

Answer:

There are 18 dimes and 12 quarters

Step-by-step explanation:

Remember that

1 Dime =$0.10

1 Quarter=$0.25

Let

x-----> the number of dimes

y-----> the number of quarters

we know that

x+y=30

x=30-y ------> equation A

0.10x+0.25y=4.80

Multiply by 100 both sides

10x+25y=480 ------> equation B

Substitute equation A in equation B and solve for y

10(30-y)+25y=480

300-10y+25y=480

15y=180

y=12 quarters

Find the value of x

x=30-y=30-12=18 dimes

therefore

There are 18 dimes and 12 quarters

You might be interested in

A triangle has a slant of 8yd, a height of 6.5yd, and a base of 4yd. What is its area?

luda_lava [24]

Answer:

B I thank

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

A spinner is divided into many sections of equal size. Some sections are red, some are blue, and the remaining are green. The pr

____ [38]

It would be D. 5/20 because the other 2 you would add then subtract and then you would just put the answer yo get from subtracting it over 20.

8 0

3 years ago

One ballispicked at random from a box containing 3redballs and 1green balls. If X is the number of redballs picked, find the pro

Paladinen [302]

Answer:

P(X = 0) = 0.25

P(X = 1) = 0.75

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The probability distribution of X.

3 red balls out of 4, one picked, so we can have either 0 red balls or 1 red ball. The probability disitribution is the probability of each outcome.

$P(X = 0) = \frac{1}{4} = 0.25$

$P(X = 1) = \frac{3}{4} = 0.75$

6 0

3 years ago

Estimates show that there are 1.4*10^8 pet fish and 9.4*10^6 pet reptiles in the United States.

Readme [11.4K]

$\bf \stackrel{fish}{1.4\times 10^8}~~+~~\stackrel{reptiles}{9.4\times 10^6}
\\\\\\
\stackrel{fish}{140000000}~~+~~\stackrel{reptiles}{9400000}\implies 
\begin{array}{rrrrllll}
140000000\\
+9400000\\
\text{\textemdash\textemdash\textemdash\textemdash\textemdash}\\
149400000
\end{array}\implies 1.494\times 10^8$

5 0

3 years ago

in a class, 3/4 of the class like to go to the movies, 2/3 like action movies... how many like action movies in the class

7nadin3 [17]

50% i'm going to show you with=25%
you start a full calls

/4 going to the movies
]/3 like action movies
25%25% =50%

8 0

3 years ago

If 30 Coins In Quarters And Dimes Are Worth $4.80, How Many Of Each Coin Are There?​

If 30 Coins In Quarters And Dimes Are Worth $4.80, How Many Of Each Coin Are There?