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Aloiza [94]
3 years ago
9

What fraction of the number are prime numbers from 2 to 14​

Mathematics
1 answer:
frez [133]3 years ago
5 0

Answer:

i hope you got it.

plz mark brainliest.

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Omg please help for brainlist !!!!!!!!!!!!!!!
LiRa [457]

Answer:

1a

Step-by-step explanation:

8000*0.25=2000

2000*0.25=500

500*0.25=125

...

5 0
3 years ago
Read 2 more answers
A bag contains 15 red candies, 15 yellow candies, and 15 blue candies. What is the probability of randomly
masya89 [10]

|\Omega|=45\cdot44=1980\\|A|=15\cdot14\cdot3=630\\\\P(A)=\dfrac{630}{1980}=\dfrac{7}{22}\approx31.8\%

6 0
2 years ago
Please help me answer this question
avanturin [10]

By <em>direct</em> substitution and simplification, the <em>trigonometric</em> function z = cos (2 · x + 3 · y) represents a solution of the <em>partial differential</em> 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>

<em>Differential</em> equations are expressions that involve derivatives. In this question we must prove that a given expression is a solution of a <em>differential</em> 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 <em>direct</em> substitution and simplification, the <em>trigonometric</em> function z = cos (2 · x + 3 · y) represents a solution of the <em>partial differential</em> 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
2 years ago
Please help with this 3a² = 27. Find a
Ivahew [28]

Answer:

a = 3

Step-by-step explanation:

3 {a}^{2}  = 27 \\  \frac{3 {a}^{2} }{3}  =  \frac{27}{3}  \\  {a}^{2}  = 9 \\ a =  \sqrt{9}  \\ a = 3

6 0
3 years ago
Read 2 more answers
Point B has coordinates (4,2). The x-coordinate of point A is - 1. The distance between point A and
Digiron [165]

Answer:

A (-1,-10) ; A (-1,14)

Step-by-step explanation:

\sqrt{(-1-4)^2 + (y-2)^2} = 13 \\ 25 + y^2 + 4 -4y = 169

y^2 -4y - 140 = 0

Δ/4 = 4 + 140 = 144

y1 = 2 + 12 = 14

y2 = 2 -12= -10

4 0
3 years ago
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