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3 years ago

15. The circumference of a circle is Ccentimeters. The diameter of the circle is 13

Mathematics

1 answer:

marysya [2.9K]3 years ago

6 0

Answer:

The answer is 6

Step-by-step explanation:

The circumstance of a circle is given by the formula

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The original price of a shirt is $25, and it’s on sale for 20% off the original price. To determine the sale price of the shirt,

nadya68 [22]

Answer:

yes

Step-by-step explanation:

25×.2=5

so the shirt is $5 off

3 0

3 years ago

Someone please explain this to me, thank you.<br><br> -63 / (-9) =

tangare [24]

Since they're both negative the answer is 7

7 0

4 years ago

Read 2 more answers

Suppose f is a function of one variable that has a continuous second derivative. Show that for any constants a and b, the functi

salantis [7]

Answer:

We can find the solution using chain rule,

For instance, if u(x,y) = f(ax+by), then

$u_{x}(x,y) = a f^{'} (ax+by)$ which represents derivative of x with respect to x

and then derivative of $u_{x}(x,y)$ with respect to y is

$u_{xy}(x,y) = (ab)^2 (f^{''} (ax+by))^2$ ,

Now, the derivative of $u_{x}(x,y)$ with respect to x, which is the second derivative, which is

$u_{xx}(x,y) = a^2 f^{''} (ax+by)$

and the derivative $u_{y}(x,y)$ and $u_{yy}(x,y)$ are

$u_{y}(x,y) = b f^{'} (ax+by)$ ,

$u_{yy}(x,y) = b^2 f^{''} (ax+by)$

Finally, the solution of PDE is

$u_{xx}(x,y) u_{yy}(x,y) - u_{xy} ^2 (x,y)$

$= (a^2 f^{''} (ax+by)) (b^2 f^{''} (ax+by)) - (ab)^2 (f^{''} (ax+by))^2$

$= (ab)^2 (f^{''} (ax+by))^2) - (ab)^2 (f^{''} (ax+by))^2$

= 0,

As the PDE is equal to 0, it means the function u(x,y) = f(ax+by) is the solution of the given PDE.

6 0

4 years ago

(√5x+11 -4)(√5x+11 +4)

grin007 [14]

Answer:

5 $x^{2}$ +49.193496x+105

Step-by-step explanation:

7 0

3 years ago

c. Using a standard deck of 52 cards, the probability of selecting a 4 of diamonds or a 4 of hearts is an example of a mutually

dybincka [34]

Answer:

True

Step-by-step explanation:

If two events X and Y are mutually exclusive,

Then,

P(X∪Y) = P(X) + P(Y)

Let A represents the event of a diamond card and B represent the event of a heart card,

We know that,

In a deck of 52 cards there are 4 suit ( 13 Club cards, 13 heart cards, 13 diamond cards and 13 Spade cards )

That is, those cards which are heart can not be diamond card,

⇒ A ∩ B = ∅

⇒ P(A∩B) = 0

Since, P(A∪B) = P(A) + P(B) - P(A∩B)

⇒ P(A∪B) = P(A) + P(B)

By the above statement,

Events A and B are mutually exclusive,

Hence, the probability of selecting a 4 of diamonds or a 4 of hearts is an example of a mutually exclusive event is a true statement.

4 0

4 years ago