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Zinaida [17]
3 years ago
10

Pls helppppp!!

Mathematics
1 answer:
Wittaler [7]3 years ago
8 0
1) -5-4i
2) 5+4i
3) -4+5i
hope this helps pls mark me branliest!!<3
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If m(x) = x2 + 3 and n(x) = 5x + 9, which expression is equivalent to (mn)(x)?
Romashka [77]
(x^2 +3)(5x+9)

5x^3 + 9x^2 + 15x + 27
3 0
3 years ago
Is x = 3 1/4 a solution to the equation 12 5/8 = x +9 1/4
navik [9.2K]

x=3 1/4 is not a solution to the equation.

12 5/8=x+9 1/4 Subtract 9 1/4 from each side 3 3/8=x, but 3 1/4=3 2/8

4 0
3 years ago
Suppose that 15% of the fields in a given agricultural area are infested with the sweet potato whitefly. One hundred fields in t
hram777 [196]

Answer:

a.\mu=15

b.\mu=7.8586 \ and  \ \mu=22.1414

c. Choice A- Based on limits above, it is unlikely that we would see x = 45, so it might be possible that the trials are not independent.

Step-by-step explanation:

a.Binomial distribution is defined by the expression

P(X=k)=C_k^n.p^k.(1-p)^{n-k}

Let n be the number of trials,n=100

and p be the probability of success,p=15\%

The mean of a binomial distribution is the probability x sample size.

\mu=np=100\times0.15=15

b.Limits within which p is approximately 95%

sd of a binomial distribution is given as:\sigma=\sqrt npq\\q=1-p

Therefore, \sigma=\sqrt(100\times0.015\times0.85)=3.5707

Use the empirical rule to find the limits. From the rule, approximately 95% of the observations are within to standard deviations from mean.

sd_1=>\mu-2\sigma=15-2\times3.3507=7.8586\\sd_2=>\mu-2\sigma=15+2\times3.3507=22.1414

Hence, approximately 95% of the observations are within 7.8586 and 22.1414 (areas of infestation).

c.  x=45 is not within the limits in b above (7.8586,22.1414). X=45 appears to be a large area of infestation. A.Based on limits above, it is unlikely that we would see x = 45, so it might be possible that the trials are not independent.

4 0
3 years ago
a circus grower ships grapefruit in boxes of 10.one season the grower shipped 20400 boxes of grapefruit. how many grapefruit wer
AveGali [126]
Its      20400
          ×   10
    
That equals 204,000. Hope I helped.
3 0
3 years ago
How do you do percentages?​
Travka [436]

https://www.skillsyouneed.com/num/percent-change.html

8 0
3 years ago
Read 2 more answers
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