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3 years ago

Please help me with math

Mathematics

1 answer:

dezoksy [38]3 years ago

4 0

Answer:

Step-by-step explanation:

The answer is:

s= -1 and t = - 1

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In a box 25 cards are there and 1 to 25 numbers are written on them. one card is drawn randomly. what is the probability that it

tensa zangetsu [6.8K]

Explanation :

Given that:

In a box 25 cards are there and 1 to 25 numbers are written on them.

• One card is drawn randomly.

To Find:

• What is the probability that it is multiple of 5.

We know that:

P(E)= F/T

Where,

P(E)= Probability of an event

• F= Favourable outcomes . T = Total outcomes

We have:

F = Number of cards which are multiple of 5

Cards having the number 5, 10, 15, 20, 25 are the multiples of 5.

So, F = 5

T = Total number of cards

• T = 25

P(F) The probabilityP(E) = The probability that it is multiple of 5

Finding the probability that it is multiple of 5:

P(E)= 5/25

P(E)=1/5

Hence,

The probability that it is multiple of 5 is ⅕

6 0

2 years ago

In order to test for the significance of a regression model involving 4 independent variables and 47 observations, the numerator

Karolina [17]

Answer:

c. 4 and 42

Step-by-step explanation:

Given

$p = 4$ -- independent variables

$n = 47$ ---- observations

Required

The numerator and denominator degrees of freedom

The denominator degrees of freedom is:

$df =n - p - 1$

$df =47 - 4 - 1$

$df =42$

For the numerator, we have:

$df = p$

$df = 4$

8 0

3 years ago

Calculate the length b to two decimal places.

Andrej [43]

Answer:

B. 21.64

Step-by-step explanation:

We have been given a triangle and we are asked to find the length of AC (b).

We will use law of cosines to find the length of side AC.

$c^{2}=a^{2}+b^{2}-2ab \text{ cos }\theta$

Upon substituting our given values in the formula we will get,

$(AC)^{2}=15^{2}+12^{2}-2\times 15\times 12 \text{ cos}(106)$

$(AC)^{2}=225+144-360\text{ cos}(106)$

$(AC)^{2}=369-360(-0.275637355817)$

$(AC)^{2}=369+99.22944809412$

$(AC)^{2}=468.22944809412$

Upon taking square root of both sides of our equation we will be get,

$AC=\sqrt{468.22944809412}$

$AC=21.6386101238993629\approx 21.64$

Therefore, the length of b is 21.64 and option B is the correct choice.

6 0

3 years ago

The gas tank of a riding mower holds 5 liters of gas how many 5 liter gas tanks can you fill from a full 20 liter gas tank

Dima020 [189]

You can fill up 4 tanks because 20 divided by 5 is 4

3 0

3 years ago

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The viewing room at a planetarium is in the shape of a hemisphere. The diameter of the hemisphere is 48 feet. What is the volume

Elis [28]

A hemisphere is half a sphere.
So, the volume of a hemisphere is the half of the volume of the complete sphere.
The formula for the volume of a sphere is:
V = (4/3) π (radius)^3
Using π = 3.14 and radius = diameter / 2 = 50 feet / 2 = 25 feet.
You get:
V = (4/3) (3.14) (25 feet)^3 = 65,416.7 feet^3
Answer: 65,416.7 cu. ft.

4 0

2 years ago

Read 2 more answers