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wolverine [178]
3 years ago
14

If f(x) = 2x^2 + 1 and g(x) = x^2 - 7, find (f - g)(x).

Mathematics
2 answers:
zavuch27 [327]3 years ago
6 0
2x squared +1 (-)x squared -7 is
a.) x squared +8
professor190 [17]3 years ago
5 0

The right answer is 3x^2 - 6 or I guess you can saw D for APEX users

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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
Rewrite the fraction in the sentence below as a percentage. In 2002, a popular company made 11/20 of its money online.​
Vladimir79 [104]

Answer:

55%

Step-by-step explanation:

11/20 = 0.55

0.55 = 55%

7 0
2 years ago
ABCDE and FGHJE are similar pentagons. If the perimeter of FGHJE is 7.3, what is the perimeter of ABCDE?
kiruha [24]
The answer would be 14.6
4 0
3 years ago
Read 2 more answers
(64/8/ 4 + 7 – 2) • 5 =
maria [59]

Answer:

35

Step-by-step explanation:

Let me know if I got it right

3 0
3 years ago
The instructions on the bag of concrete mix say to add 2 gallons of water to each 8 pound bag of concrete mix.
SVETLANKA909090 [29]

Answer:

B

Step-by-step explanation:

The ratio of water to mix is 1:4.

3 0
3 years ago
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