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lapo4ka [179]
3 years ago
12

What is the value of x in the equation 1/5x – 2/3y = 30, when y = 15? 4 8 80 200

Mathematics
2 answers:
miv72 [106K]3 years ago
6 0
Start with 1/5x – 2/3y = 30.  Let y = 15:      (<span>1/5)x – (2/3)(15) = 30

Then (1/5)x - 10 = 30, and (1/5)x = 40, and so x = 200 (answer)</span>
Hoochie [10]3 years ago
6 0
1/5x - 2/3y = 30;    y = 15

1/5x - 2/3(15) = 30

1/5x - 30/3 = 30

1/5x - 10 = 30

1/5x = 30 + 10

1/5x = 40 

x = 40 * 5

x = 200

hope this helped, God bless!
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Pachacha [2.7K]

Answer:

a) In the explanation.

b) P=0.09714

c) P=0.0866

d) p=0.208

Step-by-step explanation:

a) The sampling distribution will have this properties:

1 - The sampling distribution of a proportion is equal to the binomial distribution.

2 - The mean of the sampling distribution will be equal to the proportion of the population (0.328).

\mu=\pi=0.328

3 - The standard deviation will be equal to the square root of the product of the proportion and its complementary, divided by the sample size.

\sigma_s=\sqrt{\pi(1-\pi)/n}=\sqrt{0.328*(1-0.328)/25}=0.094

B) The fraction with sample proportion of 0.45 or higher is

z=(p-\pi)/\sigma=(0.45-0.328)/0.094=1.298\\\\P(p\geq0.45)=P(z\geq 1.298)=0.09714

C) The fraction with sample proportion of 0.20 or lower is

z=(p-\pi)/\sigma=(0.2-0.328)/0.094=-1.362\\\\P(p\leq0.2)=P(z\geq -1.362)=0.0866

D) The value of p that cuts off the lower 10% of the distribution corresponds to z=-1.28.

Then we have

z=(p-\pi)/\sigma\\\\p=\pi+z\sigma=0.328+(-1.28)*0.094=0.328-0.120=0.208

7 0
3 years ago
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Step-by-step explanation:

The value of the 8 is 80 becuse it is in the tens place.

4 0
3 years ago
On the number line below, Point B lies somewhere between Points A and C. If AB = \frac{1}{3} AC. Find BC. a 16 b 0 c 8 d 24
ollegr [7]

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete as the number line is not attached.

<em>However, the following will guide you through</em>

Given

AB = \frac{1}{3}AC

Required

Determine BC

First, we need to get the fraction of BC using the following

AB + BC = AC

Substitute \frac{1}{3}AC for AB

\frac{1}{3}AC + BC = AC

Make BC the subject of formula

BC = AC - \frac{1}{3}AC

Take LCM

BC =  \frac{3AC - AC}{3}

BC =  \frac{2AC}{3}

BC =  \frac{2}{3}AC

This implies that you multiply the length of AC by 2/3 to get BC

<em>Take for instance, AC = 24</em>

<em>BC will be:</em>

<em />BC = \frac{2}{3} * 24<em />

<em />BC = \frac{48}{3}<em />

<em />BC = 16<em />

<em />

<em>Or if AC = 12</em>

<em>BC will be:</em>

<em />BC = \frac{2}{3} * 12<em />

<em />BC = \frac{24}{3}<em />

<em />BC = 8<em />

<em />

<em>Or if AC = 36</em>

<em>BC will be:</em>

<em />BC = \frac{2}{3} *36<em />

<em />BC = \frac{72}{3}<em />

<em />BC = 24<em />

<em />

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3 years ago
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NemiM [27]

Answer:

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Step-by-step explanation:

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3 0
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ale4655 [162]

Answer: its A or B I think its more of B than A

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