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2 years ago

Please help with this ! will give brainless

Mathematics

1 answer:

irakobra [83]2 years ago

7 0

Answer:

x^13

2n^2x-5n^7

-6x^10-x

60s^7

6v^7

p^6

-4b^9/3

pls mark as brainliest if its right :)

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Multiply and simplify. (x + 3)(x - 8)

Kazeer [188]

Answer:

$x^{2} - 5x - 24$

Step-by-step explanation:

( x + 3 )( x - 8 ) =

$x^{2}$ - 8x + 3x - 24 = $x^{2}$ - 5x -24

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3 years ago

A horse ate 1.8 pounds of grass in 4 days how many grass can the horse eat for 7 days

jolli1 [7]

i think the answer to this is 3.15

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2 years ago

Read 2 more answers

Factor x^2-6x-7.<br> A.(x-7)(x+1)<br> B.(x-7)(x-1)<br> C.(x+4)(x+7)<br> D.(x+7)(x-1)

Marina86 [1]

A is the answer because x^2-6x-7 is (x-7)(x+1).

5 0

2 years ago

2. The mean birth weight of a full term boy born in the US is 7.7 lbs, with standard deviation of 1.1 lbs. A. Find the probabili

Fed [463]

Answer:

The value is $P( X < 7 ) =0.26226$

The value is $P( X < 7 ) = 0.00073$

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 7.7 lbs$

The standard deviation is $\sigma = 1.1 \ lbs$

The sample size is n = 25

Generally the probability that a boy born full term in the US weighs less than 7 lbs is mathematically represented as

$P( X < 7 ) = P( \frac{X - \mu }{\sigma} < \frac{7 - 7.7 }{1.1 } )$

$\frac{X -\mu}{\sigma } = Z (The \ standardized \ value\ of \ X )$

=> $P( X < 7 ) = P(Z$

From the z table the area under the normal curve to the left corresponding to -0.6364 is

$P(Z$

=> $P( X < 7 ) =0.26226$

Generally the standard error of mean is mathematically represented as

$\sigma_{x} = \frac{\sigma }{\sqrt{n} }$

=> $\sigma_{x} = \frac{ 1.1 }{\sqrt{25} }$

=> $\sigma_{x} = 0.22$

Generally the probability that the average weight of 25 baby boys born in a particular hospital have an average weight less than 7 lbs is mathematically represented as

$P( \= X < 7 ) = P( \frac{\= X - \mu }{\sigma_{x}} < \frac{7 - 7.7 }{ 0.22 } )$

=> $P( X < 7 ) = P(Z$

From the z table the area under the normal curve to the left corresponding to -3.1818 is

=> $P(Z$

=> $P( X < 7 ) = 0.00073$

4 0

2 years ago

Ron's piano lesson starts in 2 hours. It takes him 30 minutes to get to the lesson. He has

RideAnS [48]

Answer:

2 hours=120 mins

120-(45+25)

120-(70)

Ron has enough time to finish his homework and walk the dog before his lesson. Ron should overestimate the total time needed. Since Ron has 50 minutes to spare he could add 25 to home work time and another 25 to walking his dog. he still ha time to do both.

4 0

3 years ago