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2 years ago

describe a real world situation that is modeled by dividing two fractions or mixed numbers help me please

1 answer:

4 0

<span> your recipe calls for 1 1/2 cups of flour. you are only making half of this recipe.How much flour do you need?
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Please help, and show work if you can!! :))

dmitriy555 [2]

Answer:

Step-by-step explanation:

ΔABD ≅ ΔCBD .

So AD = DC

8x - 4 = 3x + 1 {add 4 to both sides}

8x = 3x + 1 + 4

8x = 3x + 5 {subtract 3s from both sides}

8x - 3x= 5

5x = 5 {divide both sides by 5}

x = 5/5

x = 1

8 0

2 years ago

Combine the like terms to create an equivalent expression:<br> --k+3k

iragen [17]

Answer:

idk but add me on sc at stephen.huston

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Which of the following ratios is equivalent to 2:3?

Len [333]

Answer:

14:21

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

A researcher would like to estimate p, the proportion of U.S. adults who support recognizing civil unions between gay or lesbian

Minchanka [31]

Answer:

Question 1:

(b) 4,445

Question 2:

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.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

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 $Z = 1.96$ .

Question 1:

We have no previous estimate for the population proportion, so we use $\pi = 0.5$ .

The sample size is n for which M = 0.015. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.015 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.015\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.015}$

$(\sqrt{n})^2 = (\frac{1.96*0.5}{0.015})^2$

$n = 4268$

Samples above this value should be used, and the smaller sample above this value is of 4445, so the answer is given by option b.

Question 2:

Now we find M for which $n = 2222$ .

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$M = 1.96\sqrt{\frac{0.5*0.5}{2222}}$

$M = 0.021$

So 2.1%, and the correct answer is given by option c.

3 0

2 years ago

A piece of paper measures 8.5 inches by 11 inches. Mrs. Wickowitz wants to hang paper on a bulletin board that has a height of 2

telo118 [61]

Answer:

p <= 19

Step-by-step explanation:

We have that the area of a sheet of paper is:

8.5 ft * 11 ft = 93.5 ft ^ 2

So the area of the bulletin board would come from:

1728 / 93.5 = 18.48 pieces of paper.

What it means is that the solution is a number greater than 18.48, an inequality this case represents would be:

p <= 19

Which means, as long as it's under 19, I could hang it up. It is approaching 19 because this type of situation approaches the largest number.

3 0

2 years ago