What is the measure of the base in the triangle below?
B
4x + 1
3х - 8
2x + 23
11
O 45
025
30

Answer:

The required sample size is 329.

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]

31% of all computer users in a recent year had tried to get on a Wi-Fi network that was not their own in order to save money.

This means that [tex]\pi = 0.31[/tex]

Confidence level is not given, so we assume 95%.

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].

What is the required sample size if you want to estimate this proportion with a margin of error of 0.05?

We need a sample size of n. n is found when M = 0.05. So

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

[tex]0.05 = 1.96\sqrt{\frac{0.31*0.69}{n}}[/tex]

[tex]0.05\sqrt{n} = 1.96\sqrt{0.31*0.69}[/tex]

[tex]\sqrt{n} = \frac{1.96\sqrt{0.31*0.69}}{0.05}[/tex]

[tex](\sqrt{n})^2 = (\frac{1.96\sqrt{0.31*0.69}}{0.05})^2[/tex]

[tex]n = 328.6[/tex]

Rounding up

The required sample size is 329.

Answer:

If they are parallel then the answer should be 28m

Step-by-step explanation:

Answer:

98 m

Step-by-step explanation:

105/30 = 3.5

3.5 x 28 = 98

Answer:

8.94 if no rounding is necessary.

Step-by-step explanation:

Pythagorean Theorem. What we know is only one leg and the hypotenuse, sooo...

8² + b² = 12²

64 + b² = 144

Subtract 64 from both sides...

64 - 64 + b² = 144 - 64

b² = 80

[tex]\sqrt{80}[/tex] = 8.94 if you're not rounding.

Answer:

d=7

Step-by-step explanation:

divide both sides by 6

6d=42

d=42/6

d=7

Answer:

150

Step-by-step explanation:

100%/ x% = 219/ 416

Cross multiply

x = 150 %

219 is 150% of 416

Answer:

13 minutes and 30 seconds

Step-by-step explanation:

Okay so first you would divide 128 by 576. But since it takes her 3 minutes just to type 128 words you have to multiply 4.5 times 3. It will take her 13.5 minutes to type 576 words or 13 minutes and 30 seconds.

A fraction is a part of a whole and it can be expressed as a quotient, in which the numerator is divided by the denominator.

The number of weeks the dog will take to finish 2/3 of a bag of dog food is 1 (1/2) weeks.

A fraction is a part of a whole and it can be expressed as a quotient, in which the numerator is divided by the denominator.

We have,

The amount of dog food in the bag = 2/3

The amount of dog food the dog eats per week = 4/9

We need to find the number of weeks that the dog finishes 2/3 of dog food.

The number of weeks:

1 week = 4/9 dog food

Multiply both sides by (9/4 x 2/3)

(9/4 x 2/3) x 1 week = (9/4 x 2/3) x 9/4 dog food

3/2 weeks = 2/3 dog food

[ 3/2 = 1 (1/2) ]

1(1/2) weeks = 2/3 dog food

This means in one and a half weeks the dog finished 2/3 of dog food.

Thus the number of weeks the dog will take to finish 2/3 of a bag of dog food is 1 (1/2) weeks.

Learn more about fractions here:

https://brainly.com/question/10354322

#SPJ5

Answer:

Disclaimer: I'm not sure because the numbers are too blurry. If my numbers don't match yours, just replace them in my work and recalculate them.

1) not tangent

2) tangent

3) not tangent

Step-by-step explanation:

If they are tangent, the triangles formed will be right triangles.

Check using the Pythagorean theorem:

1) 18² = 14.4² + 11.7²

324 = 207.36 + 136.89

324 ≠344.25       not tangent  

2) 7.5² = 4.5² + 6²

56.25 = 20.25 + 36

56.25 = 56.25     tangent

3) 20² = 12² + 12²

400 = 144 + 144

400 ≠ 288        not tangent

9514 1404 393

Answer:

  x² +2x +1

Step-by-step explanation:

Substitute the given expressions and collect terms.

  p(x) -t(x)

  (x² +3x -4) -(x -5)

  x² +3x -4 -x +5 . . . . . eliminate parentheses

  x² +2x +1 . . . . . . . . . .combine like terms

Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Point Form:(30/19,2/19)

Equation Form: x=30/19, y=2/19

Answer:

Kayla,  learn this,  :D  more math is based on it.  Just learn it, just memorize the following

Step-by-step explanation:

m = slope

m = rise / run

m = y2 - y1   /  x2 - x1       ( this is still rise over run but in point form )

they give us two points to plug into the above formula

P1 = (-4, 8 )  in the form of ( x1, y 1 )

P2 = (2, -1)  in the form of (x2, y2 )

now plug those into the above formula

m = ( -1 - 8 ) / ( 2-(-4) )

m = -9  /  ( 2 + 4 )

m = -9 / 6

m = - 3/2

since we know the slope now  , we can use the point slope equation of

y - y1 = m ( x - x1)

use the m we found and either point  , P1 or P2

y - 8 = -3/2(x -(-4) )

y-8 = -3/2(x + 4)

y-8 = -3/2x - 6

y = -3/2x -6 + 8

y = -3/2x + 2

there you go  :)

Answer:

the answer is the file below

Answer:

The distances AB and BC are

√

52

and therefore isosceles.

Explanation:

If we label them A(13,-2) B(9-8) and C(5-2)

The distance between A and B:13⇒9=4−2⇒−8=42+62=52 so the distance is √52

The distance between B and c:9⇒5=4−8⇒−2=642+62=52

the distance is

√

52

The distance between A and C is 8 as they are both on -2 for

y

The distances AB and BC are

√

52

and therefore isosceles.Step-by-step explanation:

Step-by-step explanation:

Area of the triangle is

= 1 /2 * base * height

= 1 /2 * 22 * 13

= 143 square kilometers

Hope it will help :)❤

Answer:

58.5

Step-by-step explanation:    

( (22 * 13) / 2 ) - ( (13 * 13) / 2 ) = ( 286 / 2 ) - ( 169 / 2 ) = 143 - 84.5 = 58.5

Answered your previous post about this question, this is the corrected version. Read the 22 as 23.  

Answer:

I believe 2.

Step-by-step explanation:

All the lengths can be multiplied by 2 to equal the lengths of the larger triangle.  However, I am not positive.

Answer:

2

Step-by-step explanation:

22x2=44

10x2=20

32x2=64

40x2=80

all of them match so yes they are equivalent

9514 1404 393

Answer:

  x = -1

Step-by-step explanation:

You want ...

  f(x) = g(x)

  -2x -8 = 4x -2

  -6 = 6x . . . . . . . . . . add 2x +2

  -1 = x . . . . . . . . . . divide by 6

Answer:

332s+(27xm)

Step-by-step explanation:

because 27 is how much you save per month and you started off with 332

Answer:

28.29 inch.

Step-by-step explanation:

So diameter is 9.

Circumference = pi x d

= 22/7 x 9

=28.29inch.

Answer:

22/7 - irrational number

1.141141114 - irrational number

17/4 - rational number

-6 - integer

[tex]\frac{\pi }{2}[/tex] - irrational number

0 - whole number

9 - natural number and whole number

21/3 - natural number and whole number

Step-by-step explanation:

natural numbers would be numbers 1,2,3,4,5,6,7...

whole numbers would be numbers 0,1,2,3,4,5,6...

integers are negative whole numbers

rational numbers are fractions and numbers that have decimal points

irrational numbers are number such as [tex]\pi[/tex] or [tex]\sqrt{5}[/tex]

Answer:

D 110°

Step-by-step explanation:

u + 40° + 30° = 180° ( being sum of angles of triangle )

u = 180° - 70°

u= 110°

Hope it helps :)

okey no links here u go

Answer:

2

Step-by-step explanation:

[4^2/(-1+3)^3+2*10] / (10+1)

= [16/8+20] / 11

= 22/11

=2

Hope this helps :) Giving me brainiest would help a lot :))

Answer:

the answer is 2

Step-by-step explanation:

sorry if this is wrong

Answer:

I need the questions, for this graph, or at least the numbers

Step-by-step explanation:

Answer: 7.8

Explanation: 8.9 - 2.9 = 6.0 + 1.8 = 7.8

Answer:

This is my answer

2x(x-4)

Step-by-step explanation:

2x(x-4)

[tex]\tt{} {2x}^{2} - 8x[/tex]

[tex]\tt{}2x \times (x - 4)[/tex]

Answer:

Step-by-step explanation:

(15x8x2)+(15x6x2)+(6x8x2)=516m

Answer:

e. M

Step-by-step explanation:

Answer:

M has line symmetry

Step-by-step explanation:

hope this helps