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3 years ago

✨Someone please help!!! I really need it!!!!!!✨

Mathematics

1 answer:

Nikitich [7]3 years ago

4 0

Answer:

9. 27/8

10. 16b^4/81a^4

11. -81v^4/t^4

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Hellpppppppppppp... '

Mars2501 [29]

Answer:

1 1/2

one and one half.

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Which expression is equivalent to (4x-3)(2x+6)

Ber [7]

It's 8x^2 + 18x -18

^2 means squared

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4 years ago

F(x)=6x^2+10x−1 How many distinct real number zeros does f have?

Nonamiya [84]

Answer:

Here, $D>0$ , hence the quadratic equation has two distinct real roots.

Step-by-step explanation:

Given quadratic equation is $6x^{2} +10x-1$ .

Let, the quadratic equation is $ax^{2} +bx+c$ [where, $a,b,c$ are the constants]

The Discriminant $(D)=b^{2}-4ac$

Case $1$ : $b^{2}-4ac>0$ , if the discriminant is greater than $0$ , it means the quadratic equation has two real distinct roots.

Case $2$ : $b^{2}-4ac$ , if the discriminant is less than $0$ , it means the quadratic equation has no real roots.

Case $3$ : $b^{2}-4ac=0$ , if the discriminants is equal to $0$ , it means the quadratic equation has two real identical roots.

Now,

we have $6x^{2} +10x-1$ , where $a=6,b=10,\ and\ c=-1$

∴ $D=b^{2}-4ac$

$=(10)^{2}-(4\times 6\times\ -1)$

$=100+24$

$= 124$

Here, $D>0$ , hence the quadratic equation has two distinct real roots.

7 0

3 years ago

The diagram shows a triangle.

kow [346]

Answer:

The value of p is not measure through brain but through the fire

6 0

3 years ago

Apparently, depression significantly increases the risk of developing dementia later in life (BBC News, July 6, 2010). In a rece

LekaFEV [45]

Answer:

0.126

Explanation:

1. Determine the percent of people who developed dementia from the entire population.

a) From the percent of people who had depression:

10% × 22% = 2.2 %

b) From the number of people who did not have depression:

90% × 17% = 15.3%

c) Total percent:

2.2% + 15.3% 17.5% of all people developed dementia.

2. Probability that the person suffered from depression earlier in life, if a person has developed dementia:

percent of people who developed dementia and had depression / percent of people who developed dementia = 2.2% / 17.5% = 0.126

Note, that this can be calculated using the formula for conditional probability:

P(A/B) = P(A∩B) / P(B)

Where:

A is having suffered depression
B is having developed dementia
A∩B is having both suffered depression and developed dementia

P(A∩B) = 22% ₓ 10% = 2.2% = 0.022

P(B) = 22% × 10% + 17% × 90% = 17.5% = 0.175

P(A/B) = P(A∩B) / P(B) = 0.022 / 0.175 = 0.126

3 0

3 years ago