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3 years ago

If f(x)=3x^2-8 and g(x)=2x, evaluate f(x)/g(x) for x=2

Mathematics

1 answer:

schepotkina [342]3 years ago

4 0

Answer:

Step-by-step explanation: Plug in the value of 2 into both equations and then just divide as said.

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13 feet in 5 steps plss

Mashutka [201]

Answer:

2.6 feet per step

Step-by-step explanation:

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3 years ago

A marketing firm is considering making up to three new hires. Given its specific needs, the management feels that there is a 50%

IRISSAK [1]

Answer:

a) 0.9

b) Mean = 1.58

Standard Deviation = 0.89

Step-by-step explanation:

We are given the following in the question:

A marketing firm is considering making up to three new hires.

Let X be the variable describing the number of hiring in the company.

Thus, x can take values 0,1 ,2 and 3.

$P(x\geq 2) = 50\%= 0.5\\P(x = 0) = 10\% = 0.1\\P(x = 3) = 18\% = 0.18$

a) P(firm will make at least one hire)

$P(x\geq 2) = P(x=2) + P(x=3)\\0.5 = P(x=2) + 0.18\\ P(x=2) = 0.32$

Also,

$P(x= 0) +P(x= 1) + P(x= 2) + P(x= 3) = 1\\ 0.1 + P(x= 1) + 0.32 + 0.18 = 1\\ P(x= 1) = 1- (0.1+0.32+0.18) = 0.4$

$\text{P(firm will make at least one hire)}\\= P(x\geq 1)\\=P(x=1) + P(x=2) + P(x=3)\\ = 0.4 + 0.32 + 0.18 = 0.9$

b) expected value and the standard deviation of the number of hires.

$E(X) = \displaystyle\sum x_iP(x_i)\\=0(0.1) + 1(0.4) + 2(0.32)+3(0.18) = 1.58$

$E(x^2) = \displaystyle\sum x_i^2P(x_i)\\=0(0.1) + 1(0.4) + 4(0.32) +9(0.18) = 3.3\\V(x) = E(x^2)-[E(x)]^2 = 3.3-(1.58)^2 = 0.80\\\text{Standard Deviation} = \sqrt{V(x)} = \sqrt{0.8036} = 0.89$

7 0

3 years ago

The sum of 8 times a number and 3 equals 5

Burka [1]

8n+3=5
8n=2
N=.25

The number is .25 or 1/4

3 0

3 years ago

Read 2 more answers

HELP WILL MARK BRAINLIEST IF GOTTEN RIGHT

lukranit [14]

Answer:

i belive it is 10

Step-by-step explanation:

sorry if this is wrong

4 0

3 years ago

What is 21divided by 7/4

Ainat [17]

21/1 divided by 7/4 = 21/1 x 4/7 = 12.

Hope this helped my guy.

3 0

3 years ago