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3 years ago

PLSSS I NEED HELP— Which expression is equivalent to -12y + 36

Mathematics

1 answer:

ioda3 years ago

3 0

Answer:

3(−4y+1)

Step-by-step explanation:

Factor −12y+3

−12y+3

=3(−4y+1)

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4 years ago

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Which expression is equivalent to the given expression? −(2n−6) −2(n−3) −2(n−6) 2n−6 2n + 6

Mice21 [21]

Eek what the heck is that

Step-by-step explanation:

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3 years ago

Anyone know how to do this!?

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4 years ago

The heights of a certain population of corn plants follow a normal distribution with mean 145 cm and stan- dard deviation 22 cm

Firdavs [7]

Answer with explanation:

Given : The heights of a certain population of corn plants follow a normal distribution with mean $\mu=145\ cm$ and standard deviation $\sigma=22\ cm$

a) Using formula $z=\dfrac{x-\mu}{\sigma}$ , the z-value corresponds to x= 135 will be

$z=\dfrac{135-145}{22}\approx-0.45$

At x= 155, $z=\dfrac{155-145}{22}\approx0.45$

The probability that plants are between 135 and 155 cm tall :-

$P(-0.45$

Hence, 34.73% of the plants are between 135 and 155 cm tall.

b) Sample size : n= 16

Using formula $z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}$ , the z-value corresponds to x= 135 will be

$z=\dfrac{135-145}{22}{\sqrt{16}}\approx-1.82$

At x= 155, $z=\dfrac{155-145}{22}{\sqrt{16}}\approx1.82$

The probability that plants are between 135 and 155 cm tall :-

$P(-1.82$

Hence,The percentage of the samples would the sample mean height be between 135 and 155 cm.= 93.12%

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4 years ago

How do you solve y=3x²-6x-1 using completing the square?

Setler79 [48]

(B/2)^2 is the formula you need to complete the square
B is the second term which is -6
So let’s plug it into the formula
(-6/2)^2
(-3)^2= 9

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3 years ago