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3 years ago

What is equation of a circle centered at (2, 4) with a radius of 2?

Mathematics

1 answer:

Bas_tet [7]3 years ago

6 0

Answer:

(x-2)²+(y-4)²=4

Step-by-step explanation:

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Let x be the amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train. Suppose that the d

larisa [96]

Answer:

a) $P(X$

$P(X>14) = 1-P(X$

b) $P(7< X$

c) We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

Step-by-step explanation:

For this case we define the random variable X as he amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train, and we know that the distribution for X is given by:

$X \sim Unif (a=0, b =20)$

Part a

We want this probability:

$P(X$

And for this case we can use the cumulative distribution function given by:

$F(x) = \frac{x-a}{b-a} = \frac{x-0}{20-0}= \frac{x}{20}$

And using the cumulative distribution function we got:

$P(X$

For the probability $P(X>14)$ if we use the cumulative distribution function and the complement rule we got:

$P(X>14) = 1-P(X$

Part b

We want this probability:

$P(7< X$

And using the cdf we got:

$P(7< X$

Part c

We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

3 0

3 years ago

given matrix A is 2x3 matrix, matrix C is a 2x1 matrix and A x B = C. what are the demensions of matrix B?

nikitadnepr [17]

Answer:

L×W=A 6 x 2 =12

Step-by-step explanation:

length ×weight =area example:you need to measure a full sheet pan and let's say if it is 8 full sheet pan you weighs 23 so you want to multiply 8×23=184 that is your area okay 2×3=6 and 2×1=2 so to figure out the area multiply 6×2=12 so the answer is matrix B just remember length times weight equal areas

4 0

4 years ago

Read 2 more answers

What is the distance between the points (–3, 4 and (–7, 4? a. 0 b. 3 c. 4 d. 10?

miskamm [114]

Try graphing it to help, but since it's not a slanted line (because the y-values are the same), you just do x1-x2:

-3 - -7 = 4

5 0

3 years ago

20 points and brainliest. Please help me.

motikmotik

Answer:

una

Step-by-step explanation:

4/20=.20

.20 per pencil

hope this helps, brainliest appreciated

3 0

2 years ago

Evaluate the expression 1 2 over 5 x plus 3 2 over 3 for x equals 1 fourth.

ch4aika [34]

The evaluated expression needed is $\frac{18}{5}$ or 3 $\frac{3}{5}$

The expression that needs to be evaluated is

1 $\frac{2}{5x}$ + 3 $\frac{2}{3}$ for x = $\frac{1}{4}$

We are being asked here to solve the mathematical equation by substituting the value of x for 1/4. If we go ahead and do the substitution we have;

1 $\frac{2}{5(0.25)}$ + 3 $\frac{2}{3}$

where x = $\frac{1}{4}$ = 0.25

this is equal to

1 $\frac{2}{1.25}$ + 3 $\frac{2}{3}$ =

1 * 8/5 + 3 * 2/3

8/5 + 2 = 18/5 = 3 $\frac{3}{5}$

Learn more on mixed fractions here brainly.com/question/17388313

5 0

2 years ago