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3 years ago

The inequality -2(x + 10) > 75 says the same thing

Mathematics

1 answer:

iren2701 [21]3 years ago

3 0

Answer: False. When multiplying or dividing by an negative inequality you flip the sign.

Step-by-step explanation:

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Complete the table of values for y=x^2-2x-3

agasfer [191]

x y

-1 0

0 -3

1 -4

2 -3

3 0

7 0

3 years ago

I need to find the surface area can someone please help

denis-greek [22]

Answer:

Base Surface Area: 1256.6370614359 km^2

(Rounded up: 1257)

Lateral Surface Area: 1915.083547902 km^2

(1915 Rounded up)

Total Surface Area: 3171.7206093379 km^2

(3172 Rounded up)

3 0

4 years ago

Which is a set of collinear points and which statement describes the drawing. Can someone help?

Reptile [31]

First exercise:

Two points are collinear if they lie on the same line. So, option A is correct, because I, H and G all lie on the same line.

Second exercise:

Opposite rays start from the same point and go in two opposite direction. So, Option B is correct, because the rays defined by the other options always have a point in common, so they actually are opposite rays. Also, YW and YX are the same ray, because they start from the same point and continue in the same direction.

6 0

3 years ago

Tennis ball with a diameter of 2.5 inches are sold in cans of three the can is a cylinder what is the volume of the space not oc

vlabodo [156]

First we need to find the volume of the three tennis balls:
V = 4/3 x Pi x r^3
V = 4/3 x Pi x 1.25^3
V = 8.18

Since there are three tennis balls:

8.18 x 3 = 24.54

Then we need to solve for the cylinder:

V = Pi x r^2 x h
V = Pi x 1.25^2 x (2.5 x 3)
V = 36.81

Then we need to find the total amount of space between the tennis balls and the cylinder

38.81 - 24.54 = 12.27 inches

<span>12.27 inches to the nearest tenth is 12.30 inches</span>

6 0

3 years ago

In Test A, suppose you make 100 experimental measurements of some quantity and then calculate mean, standard deviation, and stan

Scrat [10]

Answer:

D.) I would expect the means and standard deviations in the two test to be about the same, but the standard error in Test B should be smaller than in Test A.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean $\mu = p$ and standard deviation $s = \sqrt{\frac{p(1-p)}{n}}$

By the Central Limit Theorem:

Both tests, A and B, are of the same quantity, so they have the same mean and standard deviation. However, since the standard error is inversely proportional to the sample size, and test B has a greater sample size than test A, the standard error in test B should be lower, and thus, the correct answer is given by option D.

8 0

3 years ago