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Katarina [22]
3 years ago
6

Four fifts times what equals two thirds

Mathematics
1 answer:
SVEN [57.7K]3 years ago
7 0
(4/5)*what = (2/3)
Multiply by 5/4
.. what = (2/3)*(5/4)
.. what = 5/6
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What is the simplified version for these 4 ?
VladimirAG [237]
1. -3x + -6
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3 0
3 years ago
A researcher surveyed 150 high school students and found that 68% played a musical insturment. What would be a reasonable range
maria [59]

Answer:

The reasonable range for the population mean is (61%, 75%).

Step-by-step explanation:

The interval estimate of a population parameter is an interval of values that consist of the values within which the true value of the parameter lies with a certain probability.

The mean of the sampling distribution of sample proportion is, \hat p.

One of the best interval estimate of population proportion is the 95% confidence interval for proportion,

CI=\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}

Given:

n = 150

\hat p = 0.68

The critical value of <em>z</em> for 95% confidence level is:

z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96

Compute the 95% confidence interval for proportion as follows:

CI=\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}

     =0.68\pm1.96\sqrt{\frac{0.68(1-0.68)}{150}}\\\\=0.68\pm 0.0747\\\\=(0.6053, 0.7547)\\\\\approx (0.61, 0.75)

Thus, the reasonable range for the population mean is (61%, 75%).

5 0
3 years ago
A bag contains 7 red marbles, 3 blue marbles, 1 green what is the prob. of choosing a marble not blue?
Alex787 [66]
3 marbles as there is only one green and there is three other blue marbles left and that answer is incorrect 

8 0
3 years ago
Which inequality represents the graph below
scoray [572]

Answer:

A

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
❗️HELP ASAP❗️
tangare [24]
I think the answer is G.

I think this because of the fact families (like my elementary teacher used to say)
It’s like about multiplication of fact families so make it where it would have fact families with those numbers as the sums.
I hope this helps! Be safe out there.
3 0
3 years ago
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