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3 years ago

Bethany has $3.10 in nickels and dimes. She has a total of 44 coins. What is the value of the nickels Bethany has?

2 answers:

8 0

0.05n + 0.1d = 3.10
n + d = 44

d = 44 - n

Substituting to the first equation:

0.05n + 0.1(44 - n) = 3.10
0.05n + 4.4 - 0.1n = 3.10
-0.05n = 3.10 - 4.4
n = 26

Obtaining the value of nickels:
26 * 0.05 = 1.3

Therefore, the value of nickels that Bethany has is $1.30

Rashid [163]3 years ago

3 0

Answer:

Step-by-step explanation:

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3 years ago

If 21 = 42 39 = 618 17 = 214 then what does 45 = ?

Brums [2.3K]

Answer:

810

Step-by-step explanation:

21 = 42

Decode:

Number in the tens place = 2 x 2 = 4

Number in the ones place = 1 x 2 = 2

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39 = 618

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3 years ago

Simplify the expression 7g+4p-3g-9p

otez555 [7]

Answer:

4g-5p i think

Step-by-step explanation:

7g-3g=4g

4p-9p=-5p

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3 years ago

Read 2 more answers

The percentage of people under the age of 18 was 23.5% in New York City, 25.8% in Chicago, and 26% in Los Angeles.

Hatshy [7]

Answer:

0.0158 = 1.58% probability that all of them are under 18.

Step-by-step explanation:

Probability of independent events:

If three events, A, B and C are independent, the probability of all happening is the multiplication of the probabilities of each happening, that is:

$P(A \cap B \cap C) = P(A)P(B)P(C)$

The percentage of people under the age of 18 was 23.5% in New York City, 25.8% in Chicago, and 26% in Los Angeles.

This means that $P(A) = 0.235, P(B) = 0.258, P(C) = 0.26$

If one person is selected from each city, what is the probability that all of them are under 18?

Since the three people are independent:

$P(A \cap B \cap C) = 0.235*0.258*0.26 = 0.0158$

0.0158 = 1.58% probability that all of them are under 18.

8 0

3 years ago