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3 years ago

I NEED HELP ON THIS ASAP PLEASE I HAVE A TEST ON THIS TOMORROW

Mathematics

1 answer:

ivanzaharov [21]3 years ago

6 0

There are 21 nickels in the jar

Step-by-step explanation:

Ellie Mae has a jar that contains quarters and nickels

There are 15 more nickels than quarters
The total value is $2.55

We need to find the number of the nickles in the jar

Assume that the number of nickles is x

∵ There x nickles in the jar

∵ There are 15 more nickels than quarters

∴ The number of quarters = x - 15

∵ 1 nickle = 5 cents

∵ 1 quarter = 25 cents

∵ 1 dollar = 100 cents

∵ The total value is $2.55

- Change the total value to cents

∴ The total value = 2.55 × 100 = 255 cents

∵ 5 x + 25(x - 15) = 255

- Simplify it

∵ 5x + 25x - 375 = 255

- Add like terms

∴ 30x - 375 = 255

- Add 375 to both sides

∴ 30x = 630

- Divide both sides 30

∴ x = 21

There are 21 nickels in the jar

Learn more:

You can learn more about the word problems in brainly.com/question/13174281

#LearnwithBrainly

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Out of 450 applicants for a job, 206 are male and 62 are male and have a graduate degree.

xxMikexx [17]

Answer:

0.3009 is the probability that the applicant has graduate degree given he is a male.

Step-by-step explanation:

We are given he following in the question:

M: Applicant is male.

G: Applicant have a graduate degree

Total number of applicants = 450

Number of male applicants = 206

$n(M) = 206$

Number of applicants that are male and have a graduate degree = 62

$n(M\cap G) = 62$

$\text{Probability} = \displaystyle\frac{\text{Number of favourable outcomes}}{\text{Total number of outcomes}}$

$P(M) = \dfrac{206}{450} = 0.4578$

$P(M\cap G) = \dfrac{n(M\cap G)}{n} = \dfrac{62}{450} = 0.1378$

We have to find the probability that the applicant has graduate degree given he is a male.

$P(G|M) = \dfrac{P(G\cap M)}{P(M)} = \dfrac{\frac{62}{450}}{\frac{206}{450}} = \dfrac{62}{206} = 0.3009$

Thus, 0.3009 is the probability that the applicant has graduate degree given he is a male.

5 0

3 years ago

Pippi sold ten more cups of lemonade that cups of iced tea. She sold 120 cups in all. How many cups of lemonade did she sell?

Kamila [148]

Answer:

65 cups

Step-by-step explanation:

If she sold 10 more cups of lemonade than tea and sold 120 cups total. I first would subtract 10 cups from 120 =110. then I divide 110 /2 = 55 cups

The 55 cups makes it equal then I add the 10 cups back to the Lemonade to get 55+10 = 65

So your answer would be 65 cups of lemonade

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Of I don’t know sorry about that

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4 years ago