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3 years ago

HELP ME PLEASEEEEEEEEEE

Mathematics

2 answers:

OleMash [197]3 years ago

5 0

Answer:

x= 8

please mark as brainlist if this helps :)

Tanzania [10]3 years ago

5 0

Answer:

x=8

Step-by-step explanation:

I. firstly in algebra when a constant and a variable are together it means they are multiplying.

ii.so they are looking for 3 multiplied by what will give you 24.

iii.this is simple if you know the multiplication table.So the answer is 3 x 8= 24

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The cone shown has a height of 5 inches and a

Slav-nsk [51]

Answer:

Therefore approximate Volume of Cone is 11.78 inch³.

Step-by-step explanation:

Given:

Cone Shape :

Height = h = 5 inches

Radius = r = 1.5 inches

To Find:

Volume of Cone = ?

Solution:

Formula for Volume of Cone is given by

$\textrm{Volume of Cone}=\dfrac{1}{3}\pi (Radius)^{2}\times Height$

Substituting the given values we get

$\textrm{Volume of Cone}=\dfrac{1}{3}\pi r^{2}\times h$

$\textrm{Volume of Cone}=\dfrac{1}{3}\times 3.14\times (1.5)^{2}\times 5=11.775\ inch^{3}$

Therefore approximate Volume of Cone is 11.78 inch³.

4 0

3 years ago

The commute time for people in a city has an exponential distribution with an average of 0.5 hours. What is the probability that

mamaluj [8]

Answer:

0.314 = 31.4% probability that a randomly selected person in this city will have a commute time between 0.4 and 1 hours

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

$f(x) = \mu e^{-\mu x}$

In which $\mu = \frac{1}{m}$ is the decay parameter.

The probability that x is lower or equal to a is given by:

$P(X \leq x) = \int\limits^a_0 {f(x)} \, dx$

Which has the following solution:

$P(X \leq x) = 1 - e^{-\mu x}$

The probability of finding a value higher than x is:

$P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}$

In this question:

$m = 0.5, \mu = \frac{1}{0.5} = 2$

What is the probability that a randomly selected person in this city will have a commute time between 0.4 and 1 hours?

$P(0.4 \leq X \leq 1) = P(X \leq 1) - P(X \leq 0.4)$

In which

$P(X \leq 1) = 1 - e^{-2} = 0.8647$

$P(X \leq 0.4) = 1 - e^{-2*0.4} = 0.5507$

$P(0.4 \leq X \leq 1) = P(X \leq 1) - P(X \leq 0.4) = 0.8647 - 0.5507 = 0.314$

0.314 = 31.4% probability that a randomly selected person in this city will have a commute time between 0.4 and 1 hours

4 0

3 years ago

What is the product of (2x2 + 5x - 3) and (3x +7)?

kicyunya [14]

Answer:

6x^3 + 29x^2 + 26x -21

Step-by-step explanation:

(2x^2 + 5x -3)(3x + 7) = 6x^3 + 14x^2 + 15x^2 + 35x - 9x -21

= 6x^3 + 29x^2 + 26x -21

8 0

3 years ago

What is the answer to this?

OlgaM077 [116]

Answer:

Step-by-step explanation:

Note how this drawing is symmetrical about a horizontal line drawn halfway between AB and CD and passing through the origin.

Line AB has been subdivided into two equal pieces of length 15, so the length of AB is twice 15, or 30. Due to the symmetry shown, line CD has the same length: 30.

6 0

3 years ago

A new car is purchased for 23700 dollars. The value of the car depreciates at

Tpy6a [65]

Answer:

5 years (about)

Step-by-step explanation:

$23,700 X .13 = $3,081

$3,081 X 5 = $15,405

$23,700 - $15,405 = $8,295

Good luck! hope this helps.

(If you've noticed a mistake in my logic, please comment any corrections)

7 0

3 years ago

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