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3 years ago

WILL MARK BRAINLIEST!!! HELP!

Mathematics

1 answer:

Sphinxa [80]3 years ago

7 0

Answer:

Option B, z = 2

Step-by-step explanation:

Step 1: Factor

z^2 - 4z + 4 = 0

(z - 2)(z - 2) = 0

Step 2: Solve for z

z - 2 + 2 = 0 + 2 and z - 2 + 2 = 0 + 2

z = 2 and z = 2

Double root at z = 2

Answer: Option B, z = 2

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Factor 24j-16 to identify the equivalent expressions. Its multiple choice. A=8(3j−2) B=6(4j−2j) C=4(6j−4) D2(12−8)

Ivan

Answer:

I would say either A or C

Step-by-step explanation:

because when you distribute both they both come out to be 24j - 16

6 0

3 years ago

The rates of on-time flights for commercial jets are continuously tracked by the U.S. Department of Transportation. Recently, So

tatyana61 [14]

Answer:

The probability that at least 13 flights arrive late is 2.5196 $\times 10^{-6}$ .

Step-by-step explanation:

We are given that Southwest Air had the best rate with 80 % of its flights arriving on time.

A test is conducted by randomly selecting 18 Southwest flights and observing whether they arrive on time.

The above situation can be represented through binomial distribution;

$P(X = x) = \binom{n}{r}\times p^{r} \times (1-p)^{n-r} ; x = 0,1,2,3,.........$

where, n = number of trials (samples) taken = 18 Southwest flights

r = number of success = at least 13 flights arrive late

p = probability of success which in our question is probability that

flights arrive late, i.e. p = 1 - 0.80 = 20%

Let X = Number of flights that arrive late.

So, X ~ Binom(n = 18, p = 0.20)

Now, the probability that at least 13 flights arrive late is given by = P(X $\geq$ 13)

P(X $\geq$ 13) = P(X = 13) + P(X = 14) + P(X = 15) + P(X = 16) + P(X = 17) + P(X = 18)

= $\binom{18}{13}\times 0.20^{13} \times (1-0.20)^{18-13}+ \binom{18}{14}\times 0.20^{14} \times (1-0.20)^{18-14}+ \binom{18}{15}\times 0.20^{15} \times (1-0.20)^{18-15}+ \binom{18}{16}\times 0.20^{16} \times (1-0.20)^{18-16}+ \binom{18}{17}\times 0.20^{17} \times (1-0.20)^{18-17}+ \binom{18}{18}\times 0.20^{18} \times (1-0.20)^{18-18}$

= $\binom{18}{13}\times 0.20^{13} \times 0.80^{5}+ \binom{18}{14}\times 0.20^{14} \times 0.80^{4}+ \binom{18}{15}\times 0.20^{15} \times 0.80^{3}+ \binom{18}{16}\times 0.20^{16} \times 0.80^{2}+ \binom{18}{17}\times 0.20^{17} \times 0.80^{1}+ \binom{18}{18}\times 0.20^{18} \times 0.80^{0}$

= 2.5196 $\times 10^{-6}$ .

7 0

3 years ago

Horatio transferred a balance of $2600 to a new credit card at the beginning

4vir4ik [10]

Answer:

Step-by-step explanation:

2600(1+0.043/12)^6(1+0.137/12)^7

8 0

3 years ago

-3z-z answer please fast

ch4aika [34]

Answer:

-4z

Step-by-step explanation:

4 0

3 years ago

How much would a worker pay in taxes if his income is 750.00 and his tax bracket is 10%?

skelet666 [1.2K]

Answer:

Step-by-step explanation:

750×0.10=75

4 0

3 years ago

WILL MARK BRAINLIEST!!! HELP!​

WILL MARK BRAINLIEST!!! HELP!