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ale4655 [162]
2 years ago
7

Caitlyn pays $2.20 in postage to mail a CD to a friend. She uses 43-cent stamps and 6-cent stamps. How many of each stamp did Ca

itlyn use?
Mathematics
1 answer:
aksik [14]2 years ago
8 0

Caitlyn used 4 43-cent stamps and 8 6-cent stamps

<h3>How many of each stamp did Caitlyn use?</h3>

The given parameters are:

Amount paid = $2.20

Stamp used: 43-cent stamps and 6-cent stamps

Represent the amount of stamps in dollars

$0.43 and $0.06

Let the count of these stamps be x and y

So, we have:

0.43x + 0.06y = 2.20

Multiply through by 100

43x + 6y = 220

Let x = 4.

So, we have:

43* 4 + 6y = 220

This gives

6y = 48

Divide by 6

y = 8

Hence, Caitlyn used 4 43-cent stamps and 8 6-cent stamps

Read more about linear equation at:

brainly.com/question/14323743

#SPJ1

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MrMuchimi
A random variable following a binomial distribution over n trials with success probability p has PMF

f_X(x)=\dbinom nxp^x(1-p)^{n-x}

Because it's a proper probability distribution, you know that the sum of all the probabilities over the distribution's support must be 1, i.e.

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\mathbb E(X)=\displaystyle np\sum_{x=1}^n\frac{(n-1)!}{(x-1)!((n-1)-(x-1))!}p^{x-1}(1-p)^{(n-1)-(x-1)}
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Answer:

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How do I determine which is y=-1/3x+2?
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Step-by-step explanation:

This is a linear equation in slope intercept form which is

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In other words, look for a line that the y values increase as we go left and decrease we go right. Also look for a point (0,2) and make sure the graph pass through it.

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