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2 years ago

Can I get some help please? ASAP Solve for X. for both equations pleaseee

Mathematics

1 answer:

vichka [17]2 years ago

7 0

Answer:

$9. \: \boxed{ \tt{x = 7}} \\10. \: \boxed{ \tt{x = 6}}$

Step-by-step explanation:

$quest \: 9 \to \\ \frac{5 + x}{32} = \frac{9}{33 - 9} \\ 24(5 + x) = (32)(9) \\ 5 + x = \frac{(32)(9)}{24} \\ 5 + x = 12 \\ x = 12 - 5 \\ \boxed{ x = 7} \\ \\ quest \: 10 \to \: \\ \frac{30 - (4x - 4)}{4x - 4} = \frac{18 - 12}{12} \\ \frac{34 - 4x}{4x - 4 } = \frac{6}{12} = \frac{1}{2} \\ 2(34 - 4x) = 4x - 4 \\ 68 - 8x = 4x - 4 \\ 68 + 4 = 4x + 8x \\ 72 = 12x \\ x = \frac{72}{12} = 6 \\ \boxed{x = 6}$

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3 years ago

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3 years ago

An article regarding interracial dating and marriage recently appeared in the Washington Post. Of the 1,709 randomly selected ad

VMariaS [17]

Answer:

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Step-by-step explanation:

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

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In which

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For this problem, we have that:

323 blacks, 86% of blacks said that they would welcome a white person into their families. This means that $n = 323, p = 0.86$

95% confidence level

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

The lower limit of this interval is:

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The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.86 + 1.96\sqrt{\frac{0.86*0.14}{323}} = 0.8978$

The 95% confidence interval for the percent of all black adults who would welcome a white person into their families is (0.8222, 0.8978).

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3 years ago

I need the set up and I'm solving for x, please help.

lawyer [7]

I think it is X equals 20 because there’s 180 degrees I a triangle and 100+40= 140 and you have e 40 remaining and since it’s 2x you do 40 divided by 2 which is 20 do the inverse to check

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2 years ago

Read 2 more answers

Solving quadratic formulas<br> 8y²-30y+27=2

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2 years ago

Can I get some help please? ASAP Solve for X. for both equations pleaseee​

Can I get some help please? ASAP Solve for X. for both equations pleaseee