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Natasha2012 [34]
1 year ago
12

If f(x)=√x - 7 and g(x) = 9x-5 which statement is true?​

Mathematics
1 answer:
Natali [406]1 year ago
3 0

Answer:-7 if you allow complex numbers is in the domain of f of g. It is not in the domain if you disallow complex values

Step-by-step explanation:the domain is the set of x variables that produce a value for y. If you plug in -7 for x you get a negative value in the radical producing an imaginary number. If you allow complex values then x is in the domain. Otherwise it is not

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Which is equivalent to (3 + 2i)(3 + 2i)
Olegator [25]
(3+2i) squared I think
4 0
3 years ago
What percent of 25 is12<br><br> And how do I work it
Sergio [31]
12/25 * 100 = 48%

Amount/Whole Amount * 100

5 0
3 years ago
Read 2 more answers
Suppose that each observation in a random sample of 100 fatal bicycle accidents in 2015 was classified according to the day of t
liraira [26]

Answer:

The calculated χ² =  0.57   does not fall in the critical region χ² ≥  12.59  so we fail to reject the null hypothesis and conclude the proportion of fatal bicycle accidents in 2015 was the same for all days of the week.

Step-by-step explanation:

1) We set up our null and alternative hypothesis as

H0:  proportion of fatal bicycle accidents in 2015 was the same for all days of the week

against the claim

Ha:  proportion of fatal bicycle accidents in 2015 was not the same for all days of the week

2) the significance level alpha is set at 0.05

3) the test statistic under H0 is

χ²= ∑ (ni - npi)²/ npi

which has an approximate chi square distribution with ( n-1)=7-1=  6 d.f

4) The critical region is χ² ≥ χ² (0.05)6 = 12.59

5) Calculations:

χ²= ∑ (16- 14.28)²/14.28 + (12- 14.28)²/14.28 + (12- 14.28)²/14.28 + (13- 14.28)²/14.28 + (14- 14.28)²/14.28 + (15- 14.28)²/14.28 + (18- 14.28)²/14.28

χ²= 1/14.28 [ 2.938+ 5.1984 +5.1984+1.6384+0.0784 +1.6384+13.84]

χ²= 1/14.28[8.1364]

χ²= 0.569= 0.57

6) Conclusion:

The calculated χ² =  0.57   does not fall in the critical region χ² ≥  12.59  so we fail to reject the null hypothesis and conclude the proportion of fatal bicycle accidents in 2015 was the same for all days of the week.

b.<u> It is r</u>easonable to conclude that the proportion of fatal bicycle accidents in 2015 was the same for all days of the week

6 0
3 years ago
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storchak [24]
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6 0
3 years ago
Read 2 more answers
Aaron sold half of his comic books and then bought sixteen more. He now has 36. With how many did she begin?
Leni [432]

Answer:

40

Step-by-step explanation:

36-16 = 20

20*2=40

Lets check - half comic books - 40/2= 20 + 16 more = 36

4 0
3 years ago
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