Whoever will answer the second question will be marked brainliest.
answer faaaast

Step-by-step explanation:

The fraction of -1.75 is -1 3/4

So, 3/4 + (-1 3/4) = 1.

Answer:

B.3.2 ,3.317 ,3.606 ,3.61.

Step-by-step explanation:

i guess that is the answer,but if it isn't tell me I may try it again.good day.

Answer:

y=-3x

Step-by-step explanation:

use the point slope formula to find the line parallel to -3x-y=1

Answer:

B) y = 3x+4

Step-by-step explanation:

A parallel line should include the same the same slope for it to be parallel

Answer:

4 in

Step-by-step explanation:

Given the following data;

Length = 16 in

Width = 20 in

To find the scale factor;

Scale = 16:20

Dividing by 4, we have;

Scale = 4:5

Therefore, the scale factor is 4 in.

Scale = scale factor * ratio

Scale = 4 * (4:5)

Scale = 16:20

Answer:

D.

Step-by-step explanation:

Answer:

The test statistic for this test is: z = -2.60, option b.

Step-by-step explanation:

The test statistic is:

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.

H0: p = 0.50 vs HA : p≠0.50

This means that [tex]\mu = 0.5, \sigma = \sqrt{0.5*0.5} = 0.5[/tex]

A random sample of 900 13- to 17-year-olds found that 411 had a computer in their room with Internet access.

This means that [tex]n = 900, X = \frac{411}{900} = 0.4567[/tex]

Value of the test-statistic:

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

[tex]z = \frac{0.4567 - 0.5}{\frac{0.5}{\sqrt{900}}}[/tex]

[tex]z = -2.598[/tex]

The test statistic for this test is: z = -2.60, option b(should be).

Answer: 10:8

Step-by-step explanation:

There are 10 hamsters and 8 cats

Since hamsters is first in the ratio, you put the 10 and then the 8

10:8

Hope this helps!

Answer:

the last option 10:8....

Answer:

She talked for 138 minutes

Step-by-step explanation:

Answer:

872 sq inches

Step-by-step explanation:

Total surface area = 2 × (17 × 12) + 2 × (8 × 17) + 2 × (12 × 8)

                               = 408 + 272 + 192 = 872

Answer:

35 L

Step-by-step explanation:

because it cant be 1/4

Answer:

a) The lower bound of the confidence interval is below 4.50 minutes, which means that there is not sufficient evidence to say that the mean wait time for customers is longer than 4.50 minutes with a 98% level of confidence.

b) The null hypothesis is [tex]H_0: \mu \leq 4.50[/tex], and the alternate hypothesis is [tex]H_a: \mu > 4.50[/tex]

Step-by-step explanation:

Finding the confidence interval:

We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:

[tex]\alpha = \frac{1 - 0.98}{2} = 0.01[/tex]

Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].

That is z with a pvalue of [tex]1 - 0.01 = 0.98[/tex], so Z = 2.327.

Now, find the margin of error M as such

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.

[tex]M = 2.327\frac{2.1}{\sqrt{53}} = 0.67[/tex]

The lower end of the interval is the sample mean subtracted by M. So it is 4.94 - 0.67 = 4.27 minutes

The upper end of the interval is the sample mean added to M. So it is 4.94 + 0.67 = 5.61 minutes.

a. Is there sufficient evidence to say that the mean wait time for customers is longer than 4.50 minutes with a 98% level of confidence?

The lower bound of the confidence interval is below 4.50 minutes, which means that there is not sufficient evidence to say that the mean wait time for customers is longer than 4.50 minutes with a 98% level of confidence.

b. State the null and alternative hypotheses for the test.

Testing if there is evidence to say that the mean wait time for customers is longer than 4.50 minutes, which is the alternate hypothesis.

So the null hypothesis is [tex]H_0: \mu \leq 4.50[/tex], and the alternate hypothesis is [tex]H_a: \mu > 4.50[/tex]

8300 is the product of 8.31 and 1,000

Multiplication is a method of finding the product of two or more numbers

We need to find the product of 8.31 and 1,000.

product of Eight point three one and thousand.

In the given numbers 8.31 is a decimal number and 1000 is a whole number.

To multiply both let us make thousand as a whole number by placing two zeros on right side of 1000 with a point.

1000.00

 ×  8.31

_________

8310

Hence, 8300 is the product of 8.31 and 1,000

To learn more on Multiplication click:

https://brainly.com/question/5992872

#SPJ2

9514 1404 393

Answer:

  x = -9 (as you know)

Step-by-step explanation:

  [tex]\log_6\dfrac{1}{6}=\dfrac{x}{9}\\\\\log_6{(6^{-1})}=\dfrac{x}{9}\\\\-1=\dfrac{x}{9}\\\\x=(-1)(9)=\boxed{-9}[/tex]

_____

I find it helpful to remember that a logarithm is an exponent.

  [tex]\log_a(a^b)=b[/tex]

Answer: I dunnu what ur tryna do but i think x= 27y/2 and y= 2x/27

Step-by-step explanation:

Step-by-step explanation:

A and 3

B and 1

C and 4

D and 2

I hope this helps :)

Answer:

H0 : μD = μN

H0 : μD > μN

Test statistic = 2.192

Pvalue = 0.017

there is strong evidence that healthy adult eat more cookies for a snack when they are distracted with a computer game during lunch than when they are not.

Step-by-step explanation:

Given the data:

n1 = 22 ; x1 = 52.1 ; s1 = 45.1

n2 = 22 ; x2 = 27.1 ; s2 = 26.4

H0 : μD = μN

H0 : μD > μN

The test statistic :

(x1 - x2) ÷ (Sp*√(1/n1 + 1/n2))

Sp = (n1 - 1)s1² + (n2 - 1)s2²] ÷ (n1 + n2 - 2)

Sp = √[((21 * 45.1^2) + (21 * 26.4^2)) ÷ 42]

Sp = 36.952469

Test statistic :

(52.1 - 27.1) ÷ Sp * √(1/21 + 1/21))

25 ÷ (36.952469 * 0.3086066)

25 ÷ 11.4037758196954

Test statistic = 2.192

Using the Pvalue from Test statistic calculator :df = 42, Tscore = 2.192

Pvalue = 0.017

α = 0.05

Pvalue < α

Hence, there is strong evidence that healthy adult eat more cookies for a snack when they are distracted with a computer game during lunch than when they are not.

Answer:

C. 116

Step-by-step explanation:

Answer:

Option A

Step-by-step explanation:

It's given that cosθ = [tex]-\frac{2\sqrt{5} }{5}[/tex]

Since, cosθ = [tex]\frac{\text{Adjacent side}}{\text{Hypotenuse}}[/tex] = [tex]-\frac{2\sqrt{5} }{5}[/tex]

                                        = [tex]\frac{2}{\sqrt{5}}[/tex]

By applying Pythagoras theorem in the right triangle,

(Hypotenuse)² = (Opposite side)² + (Adjacent side)²

(√5)² = (Opposite side)² + (2)²

5 = (Opposite side)² + 4  

Opposite side = √(5 - 4)

                       = 1

Since, sinθ = [tex]\frac{\text{Opposite side}}{\text{Hypotenuse}}[/tex]

                  = [tex]\frac{1}{\sqrt{5}}[/tex]

Since, sine is positive in IInd quadrant,

sinθ = [tex]\frac{1}{\sqrt{5}}[/tex]

Therefore, option A will be the answer.

Here we want to make a system of equations and solve it, in this way, we will see that there are 8 black sheep.

first, let's define the variables:

x = number of black sheep

y = number of white sheep.

We know that:

"there are 56 sheep"

Then we can write:

[tex]x + y = 56[/tex]

We also know that there are 6 times as many white sheep than black sheep, this means that:

[tex]y = 6 \cdot x[/tex]

Then we have a system of equations:

[tex]x + y = 56[/tex]

[tex]y = 6\cdot x[/tex]

To solve this we need to start by isolating one of the variables in one of the equations. Here, we can see that the variable y is already isolated in the second equation, so we can use that.

Now we can replace that variable in the other equation:

[tex]x + y = 56[/tex]

[tex]x + 6\cdot x = 56[/tex]

Now we can solve this for x, the number of black sheep:

[tex]7\cdot x = 56\\\\x = 56/7 = 8[/tex]

There are 8 black sheep.

If you want to learn more, you can read:

https://brainly.com/question/24374693

Answer:

Factorise 18a²y - 27ay

=9ay(2a-3)

Step-by-step explanation:

9ay(2a-3)

hope it is helpful to you

Answer:

3rd option

Step-by-step explanation:

edge

Answer:

I just took the test and the answer is c

Step-by-step explanation:

Answer: 1/2

Step-by-step explanation:

This is straight from Khan

ample size and margin of error

In a one-sample

z

zz interval for a proportion, the

margin of error

margin of errorstart text, start color #11accd, m, a, r, g, i, n, space, o, f, space, e, r, r, o, r, end color #11accd, end text is how far our interval extends above and below the sample proportion:

(

statistic

)

±

(

margin of error

)

p

^

±

z

∗

p

^

(

1

−

p

^

)

n

(statistic)

p

^

​

​

±(margin of error)

±z

∗

n

p

^

​

(1−

p

^

​

)

​

​

​

Since the sample size

n

nn is in the denominator, increasing the sample size will lead to a smaller margin of error.

Hint #22 / 3

Comparing sizes of margins of error

Let's look at each margin of error in terms of its sample size.

Smaller sample,

n

=

200

n=200n, equals, 200:

=

z

∗

p

^

(

1

−

p

^

)

200

error

margin of

=z

∗

200

p

^

​

(1−

p

^

​

)

​

​

start text, e, r, r, o, r, end text, start superscript, start text, m, a, r, g, i, n, space, o, f, end text, end superscript, equals, z, start superscript, times, end superscript, square root of, start fraction, p, with, hat, on top, left parenthesis, 1, minus, p, with, hat, on top, right parenthesis, divided by, 200, end fraction, end square root

Larger sample,

n

=

800

n=800n, equals, 800:

=

z

∗

p

^

(

1

−

p

^

)

800

=

z

∗

p

^

(

1

−

p

^

)

4

⋅

200

=

z

∗

1

4

⋅

p

^

(

1

−

p

^

)

200

=

1

2

⋅

z

∗

p

^

(

1

−

p

^

)

200

error

margin of

​

=z

∗

800

p

^

​

(1−

p

^

​

)

​

​

=z

∗

4⋅200

p

^

​

(1−

p

^

​

)

​

​

=z

∗

4

1

​

⋅

200

p

^

​

(1−

p

^

​

)

​

​

=

2

1

​

⋅z

∗

200

p

^

​

(1−

p

^

​

)

​

​

​

Even though

800

800800 is

4

44 times larger than the smaller sample, the margin of error from the larger sample is

1

2

2

1

​

start fraction, 1, divided by, 2, end fraction the margin of error from the smaller sample.

Equivalently, the margin of error from the smaller sample is

2

22 times the margin of error from the larger sample.

Hint #33 / 3

Answer

The margin of error from the larger sample will be

1

2

2

1

​

start fraction, 1, divided by, 2, end fraction the margin of error from the smaller sample.

Answer:

1/2

Step-by-step explanation:

Answer:

150 A

Step-by-step explanation:

THIS THE ANSWER

I HOPE IT HELPS

Step-by-step explanation:

Let $p be the original price.

[tex](1 - 25\%)p = 30 \\ \frac{75}{100}p = 30 \\ p = 40[/tex]

∴ The original price is $40.

Answer:

2+2=4

Step-by-step explanation: big brain