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3 years ago

Help please thank you !!!

Mathematics

1 answer:

tensa zangetsu [6.8K]3 years ago

3 0

Answer: for 4 The 24 balloons cost are $40 and 9 balloons are $1.67

Step-by-step explanation:

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Madison is organizing her bookshelf. she places her favorite shelf. she puts 2 books on the second shelf and puts 4 books on the

Delicious77 [7]

The answer is 256 as on every shelf madison has squared the shelf before

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3 years ago

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A cell phone plan costs $200 to start, then charges $50 per month to maintain the account. How much will you pay for x months of

Mama L [17]

Answer:

$900

Step-by-step explanation:

add 200 to 50 times 14

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3 years ago

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For the following distribution,

Musya8 [376]

Answer:

Option B) 0.63

Step-by-step explanation:

We are given the following in the question:

X: 0 1 2 3

P(x): 0.027 0.189 0.441 0.343

We have to find the variance for the given discrete probability distribution.

$E(X) = \displaystyle\sum x_iP(x_i)\\\\E(X) = 0(0.027) + 1(0.189) + 2(0.441) + 3(0.343)\\E(X) = 2.1\\\\E(X^2) = \displaystyle\sum x_i^2P(x_i)\\\\E(X^2) = 0^2(0.027) + 1^2(0.189) + 2^2(0.441) + 3^2(0.343)\\E(X^2) = 5.04\\\\Var(X) = E(X^2) -[E(X)]^2\\Var(X) = 5.04 - (2.1)^2\\Var(X) = 0.63$

The variance of given distribution is 0.63

8 0

3 years ago

Mr. Martin is giving a math test next period. The test which is worth 100 points, has 29 problems. Each problem is worth five po

arlik [135]

Answer: division and multiplication are needed

Step-by-step explanation: first step is to do 100 divided by 29

= 3.44 etc

5 0

3 years ago

A rancher wants to create two rectangular pens, as shown in the figure, using an existing fence line as one side. The pens need

ololo11 [35]

A rancher wants to create two rectangular pens, as shown in the attached figure

Let the side parallel to the existing fence line = y
And the sides which is perpendicular to existing fence line = x
The pens need to have a total area of 972 square feet
∴ x y = 972
∴ y = 972/x

Let the length of needed fence = L
∴ L = y + 3x
substituting with the value of y
∴ $L = \frac{972}{x} +3x$
differentiating the length with respect to x and equating with zero
∴ $\frac{dL}{dx} = \frac{-972}{x^2} +3 = 0$
solve for x
∴ x = 18
substituting to find y
∴ y = 54

The dimensions should be used to minimize the amount of fence used
is 18 , 54 feet

6 0

3 years ago