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agasfer [191]
3 years ago
14

Find the value of z.

Mathematics
1 answer:
Volgvan3 years ago
7 0

Answer:

The formula for calculating a z-score is is z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation. As the formula shows, the z-score is simply the raw score minus the population mean, divided by the population standard deviation.\

Step-by-step explanation:

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According to the rational root theorem, which is a factor of the polynomial f(x)=3x^3-5x^2-12x+20?
MakcuM [25]

Answer:

(x-2), (x+2), (3x-5)

Step-by-step explanation:

Factors of 3: ±1, ±3

Factors of 20: ±1, ±2, ±4, ±5, ±10, ±20

Possible factors of the polynomial: ±1, ±2, ±3, ±4, ±5, ±10, ±20, .... (there's a lot more but you probably do not need to list them all)

Pick a number to divide the polynomial by (I picked 2)

(3x³-5x²-12x+20)÷(x-2) = 3x²+x-10

So (x-2) is a factor of f(x) = 3x³-5x²-12x+20

Factor 3x²+x-10 = (3x-5)(x-2) these are the other factors of f(x) = 3x³-5x²-12x+20

4 0
2 years ago
Graph<br>f(x) = 3 |x| + 9
Anastaziya [24]

Answer:

see graph

Step-by-step explanation:

to find points on the graph, enter in x values and find y.

3|-4|+9 =  21  (-4, 21)

3|2|+9 = 15  (2, 15

6 0
3 years ago
Find the output, y, when the input x, is 30.<br> y = 14 – 0.5x<br> y =
Mumz [18]

Answer:

y=-1

Step-by-step explanation:

14-(.5*30) same as dividing 30 by 2

14-15=-1   combine

6 0
3 years ago
Is the eye color of people on commercial aircraft flightseye color of people on commercial aircraft flights a discrete random​ v
const2013 [10]

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Step-by-step explanation:

A discrete random variable is a variable with real values that are countable.

A discrete random variable has a probability that is between 0 and 1 for each possible values and the sum of all these probabilities equals 1.

7 0
3 years ago
What is an equivalent expression for this:
Veseljchak [2.6K]
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