If someone can explain to me step by step please

Answer:

Explanation:

6/8 simplifies to 3/4

3 × 3 = 9

4 × 3 = 12

Since they are both multiples of 3, it's equivalent to 6/8.

Answer:

=6x23+4

Step-by-step explanation:

6+6x23−2

=6+6x23+−2

Combine Like Terms:

=6+6x23+−2

=(6x23)+(6+−2)

Answer:

12 x 21

Step-by-step explanation:

hope this help -____-

p.s. can u give brainliest???

Answer:

The margin of error for a 99% confidence interval is of 0.0639, that is, approximately 0.06.

The margin of error for a 95% confidence interval is of 0.0486, that is, approximately 0.05.

The margin of error for a 90% confidence interval is of 0.0408, that is, approximately 0.04.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

The margin of error is:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

350 citizens, 240 responded favorably:

This means that [tex]n = 350, \pi = \frac{240}{350} = 0.6857[/tex]

99% confidence level

So [tex]\alpha = 0.01[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.01}{2} = 0.995[/tex], so [tex]Z = 2.575[/tex].

[tex]M = 2.575\sqrt{\frac{0.6857*0.3143}{350}} = 0.0639[/tex]

The margin of error for a 99% confidence interval is of 0.0639, that is, approximately 0.06.

95% confidence level

So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].

[tex]M = 1.96\sqrt{\frac{0.6857*0.3143}{350}} = 0.0486[/tex]

The margin of error for a 95% confidence interval is of 0.0486, that is, approximately 0.05.

90% confidence level

So [tex]\alpha = 0.1[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.1}{2} = 0.95[/tex], so [tex]Z = 1.645[/tex].

[tex]M = 1.645\sqrt{\frac{0.6857*0.3143}{350}} = 0.0408[/tex]

The margin of error for a 90% confidence interval is of 0.0408, that is, approximately 0.04.

Answer: 75% of the rate lies in 47 per month and 55 per month.

Step-by-step explanation:

The mean rate for a satellite television from a sample of households was $51.00 per month,  with a standard deviation of $2.00 per month.

According to the Chebychev's Theorem, atleast [tex](1-\dfrac{1}{k^2})[/tex]  % of the data lies within k standard deviation from the mean.

For k=2

[tex]1-\dfrac1{2^2}=1-\dfrac14=\dfrac34=0.75\ or \ 75\%[/tex]

Alteast 75% of data lies within 2 standard deviation from mean.

i.e. 51-2(2) per month and 51+2(2) per month

i.e. 47 per month and 55 per month

Hence, 75% of the rate lies in 47 per month and 55 per month.

Answer:

I dont know much about algebra but I know,

1 plus 1 equals two ‍♀️

Answer:

95% Confidence Interval is; (  -5.344 to 11.344 )

Option b) -5.344 to 11.344 is the correct answer

Step-by-step explanation:

Given the data in the question;

Sample 1                 Sample 2

x"₁ = 45                   x"₂ = 42

S₁² = 85                  S₂² = 90

n₁ = 10                    n₂ = 12

df = [ S₁²/n₁ +  S₂²/n₂ ]² / [ ((S₁²/n₁)²/n₁-1) +  ((S₂²/n₂)²/n₂-1)) ]

we substitute

df = [ 10/10 +  90/12 ]² / [ ((85/10)²/10-1) +  ((90/12)²/12-1)) ] = 19.64 ≈ 20

df = 20

with 95% confidence interval

∝ = 1 - 0.95 = 0.05

∝/2 = 0.05/2 = 0.025

now, [tex]t_{\alpha /2,df} = t_{0.025, 20} = 2.086[/tex]    { from table }

95% confidence interval for N1 - N2

⇒ (x"₁ - x"₂) ± [tex]t_{\alpha /2,df}[/tex] × √( S₁²/n₁ +  S₂²/n₂ )

⇒ (45 - 42) ± 2.086 × √( 85/10 +  90/12 )

⇒ 3 ± 2.086 × 4

⇒ 3 ± 8.344

so;

Lower Limit = 3 - 8.344 = -5.344

Upper Limit = 3 + 8.344 = 11.344

Therefore, 95% Confidence Interval is; (  -5.344 to 11.344 )

Option b) -5.344 to 11.344 is the correct answer

Answer:

i think it's A

Step-by-step explanation:

Answer:

C) 2x10²

Step-by-step explanation:

1400000/7000=

1400/7=

200=

2x10²

Answer:

w = 9

Step-by-step explanation:

1. Add 15 from both sides: 8w = 72

2. Divide my 8: w = 9

Answer:

the answer for this question is 9

Answer:

30°

Step-by-step explanation:

cos Ф = 35/38

arccos (.92105) = 30°

Answer:

23182 or 23181.5109105

Step-by-step explanation:

Answer: 9e

Step-by-step explanation:

Answer:

Tisco shop

Step-by-step explanation:

The computation is shown below;

For tisco,

= 20 ÷ 4 × £1.04

= £5.2

For Azda,

= 20 ÷ 5 × £1.35

= £5.4

As if we can see that the tisco cost is lower than the azda cost so here the best value represent the tisco shop

Using cosine rule, the value of angle Y in the triangle is 21.3 degrees

The cosine rule is a mathematical formula used to calculate the length of the sides of a triangle when the angles and one side are known. It states that the square of the length of any side of a triangle is equal to the sum of the squares of the other two sides minus twice the product of those sides multiplied by the cosine of the angle between them.

Mathematically, this is expressed as;

y² = x² + w² - 2xwCos(y)

Data given;

Substituting the values into the formula above;

y² = x² + w² - 2xwCos(y)

5.5² = 2.9² + 8.1² -2(2.9)(8.1)cosY

30.25 = 8.41 + 65.61 - 46.98cosY

30.25 = 74.02 -46.98cosY

46.98cosY = 74.02 - 30.25

46.98cosY = 43.77

cos Y = 43.77 / 46.98

cos Y = 0.9317

Y = cos⁻¹(0.9317)

Y = 21.3°

Learn more on cosine rule here;

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Answer:

No

Step-by-step explanation:

2/8 is 1/4 when simplified. 1/2 is bigger than 1/4.

Answer:

d) 1.25 g

Step-by-step explanation:

If it has a half life of 40 days, there will be 5 half-lives in that span of time so if you divide 40 by 2, 5 times or just [tex]\frac{40}{2^{5} }[/tex], it will equal 1.25.

[tex]\frac{40}{2}=20\\[/tex]

[tex]\frac{20}{2} =10[/tex]

[tex]\frac{10}{2} =5[/tex]

[tex]\frac{5}{2} =2.5\\[/tex]

[tex]\frac{2.5}{2} =1.25[/tex]

Answer: 1.25g

Step-by-step explanation:

Got it rght on an assignment

Answer:

the answer is 80!!!!!!!!!!

Step-by-step explanation:

Answer: the value of ac is 36

the value of b is 13

the two numbers that have a product of ac and a sum of a and b are 4 and 9

Don't for get to drop a heart

Answer:

A = (2x+1)(3x+4)

Step-by-step explanation:

Area is length × height

Answer:

JUST DO 3.142 X 10

ANSWER: 31.42 IN

Step-by-step explanation:

Please mark as brainliest

Have a great day, be safe and healthy

Thank u  

XD

Answer:

it covered 54 and ran 6 per 9 second

Step-by-step explanation:

step 1. 78-24 = 54

step 2. 54/9 = 6

Answer:

3 teams.

Step-by-step explanation:

1 team = 6 students

23 ÷ 6 = 3.8333

Since it ends up being a decimal, the nearest number would be 3 because 23 teams isn't enough for 4 teams.

Answer:

13.5 = 9.5 + x

x=4

Step-by-step explanation:

In this problem, the price of the baseball cap, which is $9.50, and a baseball, whose price is unknown (and therefore must be the variable), total $13.50. So, to set up the equation add the two prices and set them equal to the total, 9.5+x=13.5.

Then, using the subtraction property of equality subtract 9.5 from both sides. This means x=4, so the baseball cost 4 dollars.

Answer:

The equation of the line is [tex]y = -\frac{1}{3}x - 8[/tex]

Step-by-step explanation:

Equation of a line:

The equation of a line has the following format:

[tex]y = mx + b[/tex]

In which m is the slope and b is the y-intercept.

Slope of - 1/3

This means that [tex]m = -\frac{1}{3}[/tex]

So

[tex]y = -\frac{1}{3}x + b[/tex]

Through the point (-6, -6)

This means that when [tex]x = -6, y = -6[/tex]. So

[tex]y = -\frac{1}{3}x + b[/tex]

[tex]-6 = -\frac{1}{3}(-6) + b[/tex]

[tex]b + 2 = -6[/tex]

[tex]b = -8[/tex]

The equation of the line is [tex]y = -\frac{1}{3}x - 8[/tex]

Answer:

it should be 44.91

Step-by-step explanation:

4 bars - 19.96

19.96/4 = 4.99

4.99 = 1 bar of chocolate

4.99*9 = 44.91

The amount that she will pay for 9 bars of chocolate will be R 44.91.

The rate is the ratio of the amount of something to the unit. For example - If the speed of the car is 20 km/h it means the car travels 20 km in one hour.

Zandi pays R19.96 for 4 bars of chocolate. Then the rate of each bar of chocolate is calculated as,

Rate = 19.96 / 4

Rate = R 4.99 per bar of chocolate

The amount that she will pay for 9 bars will be given as,

Amount = 9 x Rate

Amount = 9 x R 4.99

Amount = R 44.91​

The amount that she will pay for 9 bars of chocolate will be R 44.91.

More about the rate link is given below.

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The total distance of Kite from the ground is 16.38 meters and this can be determined by using the trigonometric function.

Given :

The following steps can be used in order to determine the total distance of Kite from the ground:

Step 1 - The trigonometric functions can be used in order to determine the total distance of Kite from the ground.

Step 2 - The sine function is used to measure the distance. The mathematical expression of the sine function is:

[tex]\rm sin\theta = \dfrac{P}{H}[/tex]

where P is the perpendicular and H is the hypotenuse.

Step 3 - Now, substitute the values of the known terms in the above expression.

[tex]\rm sin55 = \dfrac{Distance}{20}[/tex]

Step 4 - Simplify the above expression.

Distance = 16.38 meters

For more information, refer to the link given below:

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