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3 years ago

The sum of two numbers is 45 and the difference is 3. What are the numbers?

Mathematics

1 answer:

AVprozaik [17]3 years ago

5 0

Answer:

24 and 21 are the two numbers

Step-by-step explanation:

let n represent the unknown number

let n-3 represent the second unknown number

n+n-3 = 45

2n-3=45

2n=45+3

2n=48

n=48/2

n=24

n-3=21

CHECK: 24+21=45

.˙. the first number is 24 and the second number with a difference of 3 is 21

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3 years ago

A store owner spends 7x + 13 dollars on two orders of boxes of light bulbs, including shipping.

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Answer:

$B = 4x + 8$

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Step-by-step explanation:

Given

$Total = 7x + 13$

Represent the first order with A and the second with B.

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$A = 3x + 5$

Solving (a): Find B.

To find B, we make use of:

$A + B = Total$

Make B the subject

$B = Total - A$

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Open bracket

$B = 7x + 13 - 3x - 5$

Collect Like Terms

$B = 7x - 3x + 13 - 5$

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Solving (b): Cost of a box of light bulb

This means that:

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3 years ago

I need help on this please

Paha777 [63]

When it's laid out like that. 2 division statements on either side with one unknown variable you just cross multiply really easy

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3 years ago

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Answer:

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Step-by-step explanation:

The probability formula for a poisson distribution is:

$P( k )=\frac{\lambda^{k}e^{-\lambda}}{k!} \\$

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e is the euler's number

k is the number of events you want to know the probability

For this :

λ = 8.9 (on average the number of tickets is 8.9 per day)

k = 4 (you need to find the probability that exactly 4 tickets are written per day)

$P( k=4 )=\frac{8.9^{4}e^{-8.9}}{4!}=0,03566 =3.566\%$

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3 years ago

The sum of two numbers is 45 and the difference is 3. What are the numbers?​

The sum of two numbers is 45 and the difference is 3. What are the numbers?