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Deffense [45]
3 years ago
6

Which property is demonstrated by the following statement? 15+w+(-12)=15-12+w

Mathematics
1 answer:
Ainat [17]3 years ago
3 0
Commutative Property

The sum of two or more real numbers is always the same regardless of the order in which they are added. In other words, real numbers can be added in any order because the sum remains the same.

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You walk 2 miles in 1/2 hour ate that rate , how long will it take to walk 3 miles
irina [24]

If you walk 2 miles in 1/2 an hour, each mile took 15 minutes to walk. Add one more mile and that equals 45 minutes.


It will take 45 minutes to walk 3 miles.

4 0
3 years ago
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What do you suppose you're supposed to do here
kumpel [21]
Count how many squares are shaded in and choose the corresponding fraction i guess?
5 0
3 years ago
What number should Rihanna use for the height of the parallelogram if she uses 28 inches for the base
astraxan [27]

Answer:

Height = 7in

Step-by-step explanation:

Given

See attachment for parallelogram

Base = 28in

Required

What is the height?

The opposite sides of a parallelogram are equal and the height is the distance between the parallel sides.

From the question, we have:

Base = 28in

Also from the question, the difference between the two parallel sides is 7in.

<em>Hence, the height of the parallelogram in 7in</em>

6 0
3 years ago
A sample of 1000 college students at NC State University were randomly selected for a survey. Among the survey participants, 102
cupoosta [38]

Answer:

The upper endpoint of the 99% confidence interval for population proportion is 0.13.

Step-by-step explanation:

The confidence interval for population proportion is:

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

<u>Given:</u>

<em>n</em> = 1000

\hat p = 0.102

z_{\alpha /2}=z_{0.01/2}=z_{0.005}=2.58

*Use the standard normal table for the critical value.

Compute the 99% confidence interval for population proportion as follows:

CI=\hat p\pm z_{\alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n}}\\=0.102\pm 2.58\times\sqrt{\frac{0.102(1-0.102)}{1000}}\\=0.102\pm0.0248\\=(0.0772, 0.1268)\\\approx (0.08, 0.13)

Thus, the upper limit of the 99% confidence interval for population proportion is 0.13.

6 0
3 years ago
Help please? its an exam
poizon [28]

Answer:

Option 2

Step-by-step explanation:

In ΔABC,

AD is a median and point M is the point of concurrence of all medians.

Therefore, point M is a centroid of the triangle.

And M will divide line AD in the ratio of 1 : 2 (Ratio of AM : MD)

Since, length of MD = 2 cm

Therefore, length of AM = 4 cm

Total length of AD = AM + MD

                               = 2 + 4

                               = 6

Option 2 will be the answer.

7 0
3 years ago
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