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ANTONII [103]
2 years ago
9

A pile of 55 coins consisting of nickels and dimes is worth $3.90 . Find the number of each.

Mathematics
2 answers:
Colt1911 [192]2 years ago
8 0

Answer:

23 dimes, 32 nickels

Step-by-step explanation:

Let <em>n</em> equal the number of nickels and <em>d</em> be the number of dimes. We can use the information given to create a system of equations, as follows:

The total number of coins (the number of nickels plus the number of dimes) is 55, giving us the equation n + d = 55.

The total amount is $3.90. Since each nickel is worth $0.05 and each dime is worth $0.10, we get the equation 0.05n + 0.10d = 3.90.

Multiplying the second equation by 20, we get n + 2d = 78. We can subtract the first equation to get d = 23. Substituting this into the first equation, we get that n = 32.

Therefore, there are 23 dimes and 32 nickels.

patriot [66]2 years ago
6 0

Answer: 100 penny 2 qtrs 50 noclke

Step-by-step explanation:

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While sightseeing in Rome, Lance stopped to see the Colosseum. He learned that the height of the outer wall of the Colosseum mea
Tresset [83]

Answer:

157.44 feet

Step-by-step explanation:

Given that:

Lance is out for sightseeing in Rome.

Lance went to see the Colosseum.

Height of the outer wall of the Colosseum = 48 meters

Unit Conversion formula:

1 meter = 3.28 feet

To find:

Height of the outer wall of the Colosseum in feet.

Solution:

It is simple problem for the conversion of unit where we already know the value in one unit and the conversion formula as well.

We have to simply find how much 48 meters will be when converted in feet.

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48 meter = 48 \times 3.28 = <em>157.44 feet</em>

5 0
3 years ago
Evaluate the expression 2s for s=9
Bas_tet [7]
Hello, there!


If s = 9, then 2s = 2 * 9

2 * 9 = 18

2s = 18


I hope I helped!

Let me know if you need anything else!

~ Zoe
6 0
3 years ago
A paper clip is dropped from the top of a 144‐ft tower, with an initial velocity of 16 ft/sec. Its position function is s(t) = −
hoa [83]
To calculate the velocity, we use the given expression above which is <span>s(t) = −16t^2 + 144. First, we calculate the time it takes to reach the ground. Then, differentiate the expression and substitute time to the differentiated expression.

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5 0
2 years ago
Read 2 more answers
How do you do this problem?
faust18 [17]

The volume of the original cylinder is

... V = π·r²·h

For r=1 and h=1, this is

... V = π·1²·1 = π

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... V = 1.089π = π·1.1²·(1-k)

... 1.089/1.21 = 1-k

... k = 1 - 1.089/1.21 = 1 - 0.9 = 0.1 = 10%

The appropriate choice is (B) 10.

7 0
3 years ago
Read 2 more answers
The sale price is $6.85 less than the regular price. The sale price is
Dima020 [189]

Answer:

$49.35

Step-by-step explanation:

3 0
3 years ago
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