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2 years ago

Which of the following equation exemplifies the additive identity property???

1 answer:

4 0

The answer is c, because the identity property for addition tells us that zero added to any number is the number itself.

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Find a Cartesian equation for the curve.

Galina-37 [17]

$r = 3sec( \alpha ) \\ r = \frac{3}{cos( \alpha )}$

$x = rcos( \alpha ) \: \: \: \: \: \: \: cos( \alpha ) = \frac{x}{r}$

$r = \frac{3}{ \frac{x}{r} } \\ r = \frac{3r}{x} \: \: \: \: \: \: x = 3 \\ line$

6 0

1 year ago

How to slove this question 7v-v=12

vampirchik [111]

7v-v=12 subtract v from 7v to get 6v
6v=12 divide 12 by 6 to find variable
v=2

5 0

3 years ago

A random sample of 10 subjects have weights with a standard deviation of 9 8753 kg What is the variance of their weights? Be sur

hammer [34]

Answer: The variance of their weights = 9,752,155,009 kg.

Step-by-step explanation:

The variance is the square of the standard deviation . it measures the spread between data values in a data set.

So if standard deviation of 10 subjects = 98753 kg

Then, variance = $(9 8753 )^2\ kg=9,752,155,009\ kg$

Hence, the variance of their weights = 9,752,155,009 kg.

8 0

2 years ago

A girl has 7 skirts, 9 blouses, and 4 pairs of shoes. How many different skirt-blouse-shoe outfits can she wear

Ronch [10]

Answer: 252 i think i tried and i think its right

8 0

2 years ago

The diameter of a bacteria colony that doubles every hour is represented by the graph below. What is the diameter of the bacteri

vlada-n [284]

Option B: 256 is the diameter of the bacteria after 8 hours.

Explanation:

From the given, it is obvious that the graph is an exponential function.

The general formula is given by,

$y=a(b)^x$

Where a is the initial population,

b is the growth rate and

x is the number of hours.

It is given that the diameter of the bacteria doubles every hour.

Then, we have,

$b=2$

Let us substitute the coordinate (0,1) and $b=2$ , we get,

$1=a(2)^0$

$1=a$

Thus, substituting $a=1$ and $b=2$ in the general formula $y=a(b)^x$ , we have,

$y=1(2)^x$

We need to determine the diameter of the bacteria after 8 hours.

Let us substitute x = 8 in the equation $y=1(2)^x$ , we get,

$y=1(2)^8$

$y=1(256)$

$y=256$

Thus, the diameter of the bacteria after 8 hours is 256

Hence, Option B is the correct answer.

7 0

2 years ago