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3 years ago

Find a range of th fucunction f(x)=4x-1 for the domain{-1,0,1,2,3}

1 answer:

7 0

F(x) = 4x - 1

All you have to do is substitute the values in the domain for x in the function.

f(-1) = 4(-1) - 1
f(-1) = -4 - 1
f(-1) = -5

f(0) = 4(0) - 1
f(0) = -1

f(1) = 4(1) - 1
f(1) = 4 - 1
f(1) = 3

And so on.

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A bag contains 4 red marbles and 5 blue marbles. If two marbles are chosen at random, one at a time and without replacement, wha

Law Incorporation [45]

$|\Omega|=9\cdot8=72\\ |A|=4\cdot3=12\\\\ P(A)=\dfrac{12}{72}=\dfrac{1}{6}\approx17\%$

7 0

3 years ago

A veterinarian collects data on the number of times race horses are raced during their careers. The veterinarian finds that the

SpyIntel [72]

Answer:

c. (12.12, 18.48)

Step-by-step explanation:

Hello!

The study variable is X: number of times a racehorse is raced during its career.

The average number is X[bar]= 15.3 and the standard deviation is S= 6.8 obtained from a sample of n=20 horses.

To estimate the population mean you need that the variable has a normal distribution, in this case, we have no information about its distribution so I'll assume that it has a normal distribution. With n=20 the most accurate statistic to use for the estimation is a Students-t for one sample, the formula for the interval is:

X[bar] ± $t_{n-1;1-\alpha /2} * \frac{S}{\sqrt{20} }$

$t_{n-1;1-\alpha /2} = t_{19;0.975}= 2.093$

[15.3 ± 2.093 * $\frac{6.8}{\sqrt{20} }$ ]

[12.12; 18.48]

Using a significance level of 95% you'd expect that the true average of times racehorses are raced during their career is included in the interval [12.12; 18.48].

I hope it helps!

8 0

3 years ago

Eight less than the product of a number and four.

olchik [2.2K]

Answer:

4x - 8

Step-by-step explanation:

Let x be the number

"The product of a number and four" means 4x
"Eight less than the product of a number and four" means 4x - 8

I hope this helps!

8 0

3 years ago

Read 2 more answers

3/5 of Jill's 30 page photo album is full. She wanted to set aside 1/4 of the pages that are in there for vacation. How many pag

ElenaW [278]

4 and a half to fill 30 in total minus the ones already used 30 - 18 = 12 A forth of the pages she wants to save which is about 7.5 of the total 12 - 7.5 Means she only has 4.5 pages left to use before she starts using her extra vacation pages

3 0

4 years ago

A seamstress is paid $9.55 for every pair of pants made. how many pants would have to be made to receive $525.00 a week?

Svetlanka [38]

Let the number of pants have to be made be x.

So,

9.55 * x = 525.00

x = $\frac{525}{9.55}$ ≈ 54.97

Thus, the number of pants have to be made are 54.

8 0

3 years ago