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3 years ago

Solve for x 8/x=5/9 plzz help

Mathematics

1 answer:

Serggg [28]3 years ago

3 0

Answer:

x = 72/5

Step-by-step explanation:

One way you can solve this is by cross multiplying. Multiply 8 and 9 together and 5 and x. You will get 5x = 72. Then you divide 72 by 5 and you will get x = 72/5.

I hope this helps. Have a great rest of your day!

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The parking garage at the airport has 72 empty parking spaces and 28 full parking spaces.

viktelen [127]

Answer:

72% of the parking spaces are empty.

Step-by-step explanation:

There are 72 open spaces out of 100 total. 72/100=.72, .72*100= 72%.

3 0

3 years ago

Read 2 more answers

En la final de un concurso escolar de

Sati [7]

Usando la distribución hipergeométrica, la probabilidad de que los alumnos del colegio A obtengan los dos premios (no hay empates), es: 0.2 = 20%.

<h3>¿Qué es la fórmula de distribución hipergeométrica?</h3>

La fórmula es:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

$C_{n,x} = \frac{n!}{x!(n-x)!}$

Los parámetros son:

x es el número de éxitos.

N es el tamaño de la población.

n es el tamaño de la muestra.

k es el número total de resultados deseados.

Los valores de los parámetros son:

N = 6, k = 3, n = 2.

La probabilidad de que los alumnos del colegio A obtengan los dos premios (no hay empates), es P(X = 2), por eso:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

$P(X = 2) = h(2,6,2,3) = \frac{C_{3,2}C_{3,0}}{C_{6,2}} = 0.2$

Puede-se aprender más a cerca de la distribución hipergeométrica en brainly.com/question/24826394

#SPJ1

4 0

2 years ago

In triangle DEF, m∠D=45, m∠E=63, and EF=24 in. What is DE to the nearest tenth of an inch?

miskamm [114]

In order to use the Law of Sines, EF has to be the included side. Therefore, we need to calculate angle F which is 72 degrees.

side f / sine (F) = side d / sine (D)
side f / sine (72) = side 24 / sine (45)
side f = sine (72) * 24 / sine (45)
side f = 0.95106 * 24 / .70711
side f (DE) = <span> <span> <span> 32.2798998741 </span> </span> </span>

answer is C

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3 years ago

The school that Lisa goes to is selling tickets to

sleet_krkn [62]

Answer:

Step-by-step explanation:

8 0

3 years ago

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

Akimi4 [234]

Answer:

673 people

Step-by-step explanation:

Statistics<3

Use the margin of error formula.

ME = t* $\frac{s}{\sqrt{n} }$

Margin of error or ME = 3
Critical t or t* with a confidence level of 95% on the calculator is invNorm(.975) = 1.96. You would use invt, except you don't have the degrees of freedom, so you can approximate with invNorm. It's close enough.
Standard deviation or s = 39.7
Solve for n!

3 = 1.96* $\frac{39.7}{\sqrt{n} }$

3/1.96 = $\frac{39.7}{\sqrt{n} }$

1.531 = $\frac{39.7}{\sqrt{n} }$

39.7/1.531 = $\sqrt{n}$

25.937 = $\sqrt{n}$

25.937^2 = $\sqrt{n}$ ^2

672.7 = n

You need at least 673 people to be confident!

4 0

3 years ago