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3 years ago

In a class 30 of students, 13 have a cat and 7 have a dog. There are 4 students who

Mathematics

1 answer:

AVprozaik [17]3 years ago

7 0

Answer:

4/13

Step-by-step explanation:

"given that they have a cat?" means you are referring to only the students that have cats(that is the number on the bottom)

i am very bad at explaining math lol

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Select the correct answer.

ale4655 [162]

Answer:

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Step-by-step explanation:

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3 years ago

Right triangle similarity. what is the value of a?

kramer

Answer:

I'd say that a is 6 2/3 units long

Step-by-step explanation:

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2 years ago

PLEASE ANSWER FAST BRAINLIEST TIMED !!!

Levart [38]

Answer:

43.2

Step-by-step explanation:

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3 years ago

Verify the identity. cot. (x - (pi/2)) = -tan x Please, help me!!!

Leya [2.2K]

Answer:

cot . (x- π/2)= - tanx

Step-by-step explanation:

cot . (x- π/2)= - tanx

cot .x - cot π/2= - tanx

cot π/2= 1/tanπ/2

But tan π/2= ∞

cot π/2 = 1/∞= 0

cotx - 0= - tanx

cot x = - tanx

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cosx/ sinx ( sinx/cos x) = -sinx/cos x (sinx/cos x )

Multiplying both sides with sinx/cos x

1= - sin²x/cos²x

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5 0

3 years ago

If x varies inversely as y 2, and x = 2 when y = 20, find x when y = 5.

Dominik [7]

Step-by-step explanation:

$x = \frac{k}{y}$

x varies inversely as y. This means that x is equal to the inverse of y which can be translated as x = 1/y but the problem said that x is not exactly equal to the inverse of y. Therefore, we need to introduce a factor k. Factor k will represent the word "varies" in the problem.

To illustrate:

$x = \frac{k}{y}$

Since we don't have the value of k, we have to solve for it by using the first values of x and y which was given as x=2 and y=20.

$x = \frac{k}{y} \\ 2 = \frac{k}{20} \\ k = 2(20) = 40$

Now that we have the value of k, we can now solve for the value of x when y=5.

$x = \frac{k}{y} \\ = \frac{40}{5} \\ = 8$

Therefore, when y is 5, the value of x is 8.

6 0

3 years ago