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Westkost [7]
3 years ago
15

Ixl HELP pLease get this done quick

Mathematics
2 answers:
Alja [10]3 years ago
5 0

Answer:

  • -18

Step-by-step explanation:

  • 2(4 - 1/3u) = - u + 2
  • 8 - 2/3u = - u + 2
  • u - 2/3u = 2 - 8
  • 1/3u = -6
  • u = -6*3
  • u = -18
yawa3891 [41]3 years ago
5 0

\huge \boxed{\mathbb{QUESTION} \downarrow}

  • \sf2 \left( 4- \frac{ 1  }{ 3  }  u  \right)   =  -u+2

\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}

\sf \: 2 \left( 4- \frac{ 1  }{ 3  }  u  \right)   =  -u+2

Use the distributive property to multiply 2 by \sf 4-\frac{1}{3}u.

\sf \: 8+2\left(-\frac{1}{3}\right)u=-u+2

Express \sf2\left(-\frac{1}{3}\right) as a single fraction.

\sf \: 8+\frac{2\left(-1\right)}{3}u=-u+2

Multiply 2 and -1 to get -2.

\sf \: 8+\frac{-2}{3}u=-u+2

Add u to both sides.

\sf \: 8-\frac{2}{3}u+u=2

Combine \sf-\frac{2}{3}u and u to get \sf\frac{1}{3}u.

\sf \: 8+\frac{1}{3}u=2

Subtract 8 from both sides.

\sf\frac{1}{3}u=2-8

Subtract 8 from 2 to get -6.

\sf\frac{1}{3}u=-6

Multiply both sides by 3, which is the reciprocal of 1/3.

\sf \: u=-6\times 3

Multiply -6 and 3 to get -18.

\boxed{  \boxed{\bf \: u=-18 }}

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In an agricultural study, the average amount of corn yield is normally distributed with a mean of 185.2 bushels of corn per acre
RideAnS [48]

Answer: B. 461 acres

Step-by-step explanation:

Given : In an agricultural study, the average amount of corn yield is normally distributed with a mean of 185.2 bushels of corn per acre, with a standard deviation of 23.5 bushels of corn.

i.e. \mu=185.2\ \ , \ \sigma=23.5

Let x denotes the amount of corn yield.

Now, the probability that the amount of corn yield is more than 190 bushels of corn per acre.

P(x>190)=P(\dfrac{x-\mu}{\sigma}>\dfrac{190-185.2}{23.5})

[Formula : z=\dfrac{x-\mu}{\sigma}]

=P(z>0.2043)=1-P(z  [∵ P(Z>z)=1-P(Z<z)]

1-0.5809405   [using z-value calculator or table]

=0.4190595

Now, If a study included 1100 acres then the expected number to yield more than 190 bushels of corn per acre :-

0.4190595\times1100=460.96545\approx461\text{ acres}

hence, the correct answer is B. 461 acres .

8 0
3 years ago
Cuál sería la respuesta a esto? La señora María obtuvo un préstamo de 5 millones otorgado por un banco, para devolver el préstam
Lubov Fominskaja [6]

Answer:

La señora María debe pagar 463.635 guaraníes por concepto de intereses,

Step-by-step explanation:

Se recomienda utilizar el modelo de interés compuesto puesto que la tasa de interés es constante y periódico, dado que se conoce el monto a pedir prestado, la tasa de interés y el número de anualidades, se obtiene el monto final. La cantidad de dinero a pagar es la diferencia entre ese resultado y el monto a ser prestado.

El modelo de interés compuesto es representado por la siguiente fórmula:

C(t) =C_{o}\cdot (1+r)^{t} (1)

Donde:

C_{o} - Cantidad de dinero a prestar, medida en guaraníes.

r - Razón de interés interanual, adimensional.

t - Anualidad, medida en años.

C(t) - Cantidad de dinero asociada a la anualidad actual, medida en guaraníes.

Si sabemos que C_{o} = 5.000.000, r = 0.03 y t = 3, entonces la cantidad de dinero asociada al término del período de préstamo es:

C(3) = 5.000.000\cdot (1+0.03)^{3}

C(3) = 5.463.635

Finalmente, la cantidad de dinero a pagar por concepto de intereses es:

\Delta C = 5.463.635-5.000.000

\Delta C = 463.635

La señora María debe pagar 463.635 guaraníes por concepto de intereses,

3 0
3 years ago
Someone help me please
Mama L [17]

B is the correct answer! U have clicked the right thing...

3 0
3 years ago
Read 2 more answers
#1 $11.49 for 3 packages and fid the unit rate.round to the nearest hundredth if necessary
mote1985 [20]
If you would like to find the unit rate, you can calculate this using the following steps:

$11.49 ... 3 packages
$x = ? ... 1 package

11.49 * 1 = 3 * x
11.49 = 3 * x         /3
x = 11.49 / 3
x = $3.83

The correct result would be $3.83.
3 0
4 years ago
Read 2 more answers
A researcher wishes to​ estimate, with 9090​% ​confidence, the proportion of adults who have​ high-speed Internet access. Her es
Sunny_sXe [5.5K]

Answer:  a) Required minimum sample size= 219

b) Required minimum sample size= 271

Step-by-step explanation:

As per given , we have

Margin of error : E= 5% =0.05

Critical z-value for 90% confidence interval : z_{\alpha/2}=1.645

a) Prior estimate of true proportion: p=28%=0.28

Formula to find the sample size :-

n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.28(1-0.28)(\dfrac{1.645}{0.05})^2\\\\=218.213856\approx219

Required minimum sample size= 219

b) If no estimate of true proportion is given , then we assume p= 0.5

Formula to find the sample size :-

n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.645}{0.05})^2\\\\=270.6025\approx271

Required minimum sample size= 271

8 0
3 years ago
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