3 years ago

What property proves equivalency?

Mathematics

1 answer:

Olenka [21]3 years ago

8 0

Answer:

i think its c.distributive

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The convenience store sells a 16-ounce bottle of water for $2.40 and a 28-ounce bottle of water for $2.80. Tiana wants to compar

mezya [45]

Answer:

The cost of 16 ounce bottle would be .15 cents per ounce = $2.40

Step-by-step explanation:

2.40/16= .15

2.80/28= .10

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2 years ago

5. The area of the trapezoid is 75 square inches. Find the height of the trapezoid. And it’s two bases are 10 and 15.

GaryK [48]

6

6
h/2(sum of bases) =75=area
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Mark brainliest please

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2 years ago

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Fittoniya [83]

I think 1 is -540 and 2 is -290

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3 years ago

A teacher was interested in knowing the amount of physical activity that his students were engaged in daily. He randomly sampled

klasskru [66]

Answer:

The standard error of the mean is 4.5.

Step-by-step explanation:

As we don't know the standard deviation of the population, we can estimate the standard error of the mean from the standard deviation of the sample as:

$\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}$

The sample is [30mins, 40 mins, 60 mins, 80 mins, 20 mins, 85 mins]. The size of the sample is n=6.

The mean of the sample is:

$\bar{x}=\frac{1}n} \sum x_i =\frac{30+40+60+80+20+85}{6}=52.5$

The standard deviation of the sample is calculated as:

$s=\sqrt{\frac{1}{n-1}\sum (x_i-\bar x)^2} \\\\ s=\sqrt{\frac{1}{5}\cdot ((30-52.5)^2+(40-52.5)^2+(60-52.5)^2+(80-52.5)^2+(20-52.5)^2+(85-52.5)^2}\\\\s=\sqrt{\frac{1}{5} *3587.5}=\sqrt{717.5}=26.8$

Then, we can calculate the standard error of the mean as:

$\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}=\frac{26.8}{6}= 4.5$

6 0

3 years ago

One of the legs of a right triangle measures 2 cm and its hypotenuse measures 18 cm.

denpristay [2]

Answer:

17.9

Step-by-step explanation:

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2 years ago