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3 years ago

9. What is the length of the

Mathematics

2 answers:

boyakko [2]3 years ago

7 0

Answer:

I don't know what nearest tenth of a unit means but answer is 78.23682

densk [106]3 years ago

6 0

Answer:

Step-by-step explanation:

Substitute 15 in place of all your x and set up the following:

(4*15+4)^2 + (3*15)^2 = c^2

64^2 + 45^2 = c^2

4096 + 2025 = c^2

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-x^2=-36 I need help

Gennadij [26K]

You need to first make everything positive:
x^2=36
Then you need to get the square root of each side:
x=6 or -6

Hope this helps :)

4 0

3 years ago

a woman spent two thirds of her money. she lost two thirds of the remiander and then had $4(aus money) left. how much money did

Dima020 [189]

Answer:

1/3 x - 2/9 x = 4

3/9 x - 2/9 x = 4

1/9 x = 4

x = 36

<h3>First she lost 2/3 of 36, which is 24. She had 12 left. Then she lost 2/3 of 12 which is 8. She had 4 left.</h3>

Hence she started with $36 .

Step-by-step explanation:

<h2>Hope this helps you !! </h2>

6 0

3 years ago

Why do we add the opposite when subtracting integers ?

katen-ka-za [31]

Neagtive means go backwards or oposite
it takes away that many units

7 0

3 years ago

The number of books borrowed from a library each week follows a normal distribution. When a sample is taken for several weeks, t

Marat540 [252]

$\mathbb P(X>250)=\mathbb P\left(\dfrac{X-190}{30}>\dfrac{250-190}{30}\right)=\mathbb P(Z>2)\approx0.0228$

Or, if you're familiar with the empirical rule and the basic properties of the normal distribution, you can use the fact that approximately $95/%$ of the distribution lies within two standard deviations of the mean, or

$\mathbb P(|Z|$

which means about $5\%$ of the distribution lies outside this interval, or

$\mathbb P((-22))\approx0.05$

Because the distribution is symmetric, you have

$\mathbb P(-22)$
$\implies \mathbb P((-22))=\mathbb P(-22)=2\mathbb P(Z>2)\approx0.05$
$\implies \mathbb P(Z>2)\approx 0.025$

8 0

3 years ago

Read 2 more answers

What is the surface area of this right rectangular prism? Enter your answer as a

mixas84 [53]

You will find all of the surface area of all of the sides and add them together to find the surface area of the retangular prisim. So, what I would do is the front and back are both 54, so 108. The sides are 27, so 54. The top and bottom are 18, so 36. Add them together, and you will get 198. I hope this helps.

6 0

3 years ago