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3 years ago

6

Solve 3=1/2x + 5/2 by graphing

1 answer:

Hatshy [7]3 years ago

7 0

Sorry, I can't do a graph on here for you.

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there are 2 cups of flour in a batch of pancakes. many is making 3/2 batches . how can many tell if he needs more or fewer than

Sedaia [141]

Answer: Manny is making 3/2 batches, which is equivalent to 1.5, it's more than one. So, Manny is making more than 1 batch. According to the problem, 2 cups of flour in a batch, if he's making 1.5 batch, he would need 3 cups of flour, which is more than 2 cups of flour.

Step-by-step explanation:

5 0

2 years ago

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:

(c) 2.1%

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

Lana is using a can opener to open a can of soup. Every time she twists the knob of the can opener, the can turns 36 degrees. Ho

In-s [12.5K]

Answer:

A

Step-by-step explanation:

There are 360 degrees in a circle. 36 is one tenth of 360. It will take 10 turns to reach 360 degrees, and open the can.

4 0

2 years ago

Read 2 more answers

Solve for y<br> 4y = 32<br> Please answer!

grigory [225]

Answer:

y = 8

Step-by-step explanation:

4t=32

Divide each side by 4

4y/4 = 32/4

y = 8

3 0

2 years ago

Read 2 more answers

A balloon vendor sold 225 balloons

trapecia [35]

50

Explanation: choose pattern and let statement

Mark brainliest please

7 0

2 years ago