Will give brainlist

stira [4]

The ratio of 7200 to 6400 equals 1.125 in decimal form. I hope this helps!:)

5 0

3 years ago

There are 4 jacks in a standard deck of 52 playing cards. If patricia selects a card at random, what is the probability that it

sammy [17]

Answer:

(C) 1/13

Step-by-step explanation:

Since, In a pack of 52 playing cards, there are 4 jacks in total.

If patricia selects a card at random, then the probability that it will be a jack will be:

Probability it is a jack= $\frac{Total number of jacks}{Total number of cards}$

= $\frac{4}{52}$

= $\frac{1}{13}$

Which is the required probability.

5 0

2 years ago

Read 2 more answers

Please help me answer this question

avanturin [10]

By direct substitution and simplification, the trigonometric function z = cos (2 · x + 3 · y) represents a solution of the partial differential equation $\frac{\partial^{2} t}{\partial x^{2}} - \frac{\partial^{2} t}{\partial y^{2}} = 5\cdot z$ .

<h3>How to analyze a differential equation</h3>

Differential equations are expressions that involve derivatives. In this question we must prove that a given expression is a solution of a differential equation, that is, substituting the variables and see if the equivalence is conserved.

If we know that $z = \cos (2\cdot x + 3\cdot y)$ and $\frac{\partial^{2} t}{\partial x^{2}} - \frac{\partial^{2} t}{\partial y^{2}} = 5\cdot z$ , then we conclude that:

$\frac{\partial t}{\partial x} = -2\cdot \sin (2\cdot x + 3\cdot y)$

$\frac{\partial^{2} t}{\partial x^{2}} = - 4 \cdot \cos (2\cdot x + 3\cdot y)$

$\frac{\partial t}{\partial y} = - 3 \cdot \sin (2\cdot x + 3\cdot y)$

$\frac{\partial^{2} t}{\partial y^{2}} = - 9 \cdot \cos (2\cdot x + 3\cdot y)$

$- 4\cdot \cos (2\cdot x + 3\cdot y) + 9\cdot \cos (2\cdot x + 3\cdot y) = 5 \cdot \cos (2\cdot x + 3\cdot y) = 5\cdot z$

By direct substitution and simplification, the trigonometric function z = cos (2 · x + 3 · y) represents a solution of the partial differential equation $\frac{\partial^{2} t}{\partial x^{2}} - \frac{\partial^{2} t}{\partial y^{2}} = 5\cdot z$ .

To learn more on differential equations: brainly.com/question/14620493

#SPJ1

3 0

1 year ago

Use any model you choose to find the quotient. 4 divided by 1/3

Ronch [10]

12

The question is basically doing 4 x 3, which is equivalent to 12 :)

4 0

3 years ago

A time lapse camera takes pictures once every 50 seconds. How many pictures does it take in a 48 hour period? (Assume that it ta

hram777 [196]

Answer:

3,456 pictures

Step-by-step explanation:

It can take 72 pictures in an hour. (3600 seconds in an hour ÷ 50 seconds)

72 × 48 = 3456 photos

5 0

2 years ago

Will give brainlist​

Will give brainlist