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Alex_Xolod [135]
2 years ago
5

Which of the following is a factor of 3x3-12x2 +X-4 ? A. X+3 B. X+2 C. X-4 D.X-1

Mathematics
2 answers:
DiKsa [7]2 years ago
6 0

Answer:

B.x+2

Step-by-step explanation:

Shtirlitz [24]2 years ago
4 0
The answer is B. X+2
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Joses ACT score had a z-score of .75.what was his ACT score?<br><br><br> mean score=21.1 sd=5.2
Zielflug [23.3K]

Answer:

X \sim N(21.1,5.2)  

Where \mu=21.1 and \sigma=5.2

And the z score is given by:

z = \frac{x -\mu}{\sigma}

And since z = 0.75 we can replace like this:

0.75 = \frac{x- 21.1}{5.2}

And if we solve for x we got:

x = 21.1 +0.75*5.2 = 25

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the ACT scores of a population, and for this case we know the distribution for X is given by:

X \sim N(21.1,5.2)  

Where \mu=21.1 and \sigma=5.2

And the z score is given by:

z = \frac{x -\mu}{\sigma}

And since z = 0.75 we can replace like this:

0.75 = \frac{x- 21.1}{5.2}

And if we solve for x we got:

x = 21.1 +0.75*5.2 = 25

6 0
3 years ago
Gus earned $110 the first week he cut grass in the summer. His last week he earned $350. What was his percent increase in earnin
liq [111]
It would be a 218.182% increase
4 0
3 years ago
Please HELP!<br><br> A. <br> B.<br> C.<br> D
pickupchik [31]

Answer:

if that line follows y=mx...then answer is A

But it seems not....when we divided valuse like 60/2=30

75/3=25....

ratio is not the same

Its hard to tell....You must know exact cordinations

I can tell you this

I can say this if y=60 and x=2 and....y=120 and x=4...then it is propotional...but it seems not..

3 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
storchak [24]

Answer:

a_n = 1200(1.35)^n

Step-by-step explanation:

Equation to remember:

P_0(1+r)^t where t = time

P_0 = 1200 since that's the initial population

r  = .35 rate of change \\

t  = 5 years

Plug in the numbers;


a_5 = 1200(1+.35)^5


Since the prompt looks like it's asking for an equation given any number of years.. then just change 5 to n for number of years.


a_n = 1200(1.35)^n

8 0
2 years ago
Read 2 more answers
Which equation represents a line that passes through (-2, 4) and has a slope of 1/2?
jok3333 [9.3K]

Answer:

\large\boxed{y-4=\dfrac{1}{2}(x+2)\text{- point-slope form}}\\\boxed{y=\dfrac{1}{2}x+5\text{- slope-intercept form}}

Step-by-step explanation:

The point-slope form of an equation of a line:

y-y_1=m(x-x_1)

m - slope

We have the slope m=\dfrac{1}{2} and the point (-2, 4).

Substitute:

y-4=\dfrac{1}{2}(x-(-2))

y-4=\dfrac{1}{2}(x+2) - point-slope form

Convert to the slope-intercept form (y = mx + b):

y-4=\dfrac{1}{2}(x+2)      <em>   use the distributive property</em>

y-4=\dfrac{1}{2}x+1         <em>add 4 to both sides</em>

y=\dfrac{1}{2}x+5 - slope-intercept form

3 0
3 years ago
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