How many solutions does the system of equations below have? y = 7 6 x + 6 7 y = 9 2 x − 4 9

Answer:

18. lol

Step-by-step explanation:

Answer:

using the Pythagoras theorem,

[tex]a { }^{2} + b {}^{2} = c {}^{2} [/tex]

144+225=c squared

369=c sqared

13=c

so, your unknown value is 13

Answer: The time taken for the mass to reduce from 50 g to 41 g is 6 years

Step-by-step explanation:

Expression for rate law for first order kinetics is given by

[tex]t=\frac{2.303}{k}\log\frac{a}{a-x}[/tex]

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  

a - x = amount left after decay process  

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

[tex]t_{\frac{1}{2}}=22 years[/tex]

[tex]k=\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{22}=0.0315years^{-1}[/tex]  

b) for mass to reduce from 50 g to 41 g

[tex]t=\frac{2.303}{0.0315}\log\frac{50}{41}[/tex]

[tex]t=6years[/tex]  

The time taken for the mass to reduce from 50 g to 41 g is 6 years

Answer:

pls resnap, i tried to zoom in but i can't see clearly

Answer:

t/2 + 4

Step-by-step explanation:

Answer:

Its 1/2t + 4

T = 1/2 + 4/1 = 4/2 = 2

Your answer is 2

Step-by-step explanation:

I hope this helps!

Answer:

x = 8√2

Step-by-step explanation:

Use Pythagorean Theorem to solve for x.

x² + x² = 16²

⇒ 2x² = 256

⇒ x² = 128

⇒ x = 8√2

Responder:

0,1536

0.0256

0.4096

Explicación paso a paso:

Dado que :

p = 0,2

Número de ensayos, n = 4

1 - p = 1 - 0,2 = 0,8

Probabilidad de que 2 sean defectuosos;

Usando la fórmula de distribución binomial:

P (x = 2)

P (x = x) = nCx * p ^ x * (1 - p) ^ (n - x)

P (x = 2) = 4C2 * 0.2 ^ 2 * 0.8 ^ 2

P (x = 2) = 6 * 0,04 * 0,64

P (x = 2) = 0,1536

3 están defectuosos:

P (x = 3) = 4C3 * 0,2 ^ 3 * 0,8 ^ 1

P (x = 3) = 4 * 0,008 * 0,8

P (x = 3) = 0,0256

Probabilidad de que ninguno sea defectuoso:

P (x = 0) = 4C0 * 0.2 ^ 0 * 0.8 ^ 4

P (x = 0) = 1 * 1 * 0,4096

P (x = 0) = 0,4096

Usando la distribución binomial, se encuentra que hay una probabilidad de:

a) 0.1536 = 15.35% que 2 sean defectuosos.

b) 0.0256 = 2.56% que 3 sean defectuosos.

c) 0.4096 = 40.96% que ninguno sea defectuosos.

Para cada objeto, solo hay dos resultados posibles. O está defectuoso o no lo es. La probabilidad de que un objeto sea defectuoso es independiente de cualquier otro ítem, lo que significa que se utiliza la distribución binomial para resolver esta cuestión.

Distribución binomial:

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

Los parámetros son:

En este problema:

Item a:

Esta probabilidad es P(X = 2), o sea:

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]P(X = 2) = C_{4,2}.(0.2)^{2}.(0.8)^{2} = 0.1536[/tex]

Probabilidad de 0.1536 = 15.35% que 2 sean defectuosos.

Item b:

Esta probabilidad es P(X = 3), o sea:

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]P(X = 3) = C_{4,3}.(0.2)^{3}.(0.8)^{1} = 0.0256[/tex]

Probabilidad de 0.0256 = 2.56% que 3 sean defectuosos.

Item c:

Esta probabilidad es P(X = 0), o sea:

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]P(X = 0) = C_{4,0}.(0.2)^{0}.(0.8)^{4} = 0.4096[/tex]

Probabilidad de 0.4096 = 40.96% que ninguno sea defectuosos.

Un problema similar es dado en https://brainly.com/question/25132113

Answer:

3 times a number is 3x

decreased by 14 is '- 14'

is 4 is '= 4'

So we have:

3x - 14 = 4

Add 14 to both sides:

3x = 18

Divide 3 to both sides:

x = 6

Step-by-step explanation:

The expression for the given statement "fourteen decreased by three times four" is written as 14 - (3×4), and its solution is 2.

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

The given statement "fourteen decreased by three times four" can be written in the form of expression as,

14 - (3×4)

Now, if we solve the expression, the solution will be,

14 - (3×4)

= 14 - 12

= 2

Hence, the expression for the given statement "fourteen decreased by three times four" is written as 14 - (3×4), and its solution is 2.

Learn more about Expression here:

https://brainly.com/question/13947055

#SPJ2

Answer:

Ok, we know that we have a parabola (a quadratic equation) that is concave down.

This means that the "arms" of the graph will go down, then, the vertex is the maximum of the parabola.

Now we know that the vertex (again, the maximum) is on the third quadrant, this quadrant is on the negative region of x and on the negative region of y.

So, if from this point the arms of the parabola go down, then the arms will never intersect the x-axis.

So we do not have x-axis intercepts, which means that this parabola as no real roots.

And a parabola has always a y-intercept, but we have no enough information to conclude which is the y-intercept.

Answer:

15! all the sides are the same length

Step-by-step explanation:

60/4

15

Answer:

The slope of line g is [tex]\frac{2}{9}[/tex].  

Step-by-step explanation:

We know that line f has a slope of [tex]-\frac{9}{2}[/tex] and that line g and line f are perpendicular to each other. Perpendicular lines have slopes that are opposite reciprocals of each other. Thus, the opposite reciprocal of  [tex]-\frac{9}{2}[/tex] must be the slope of line g.  

To find the opposite reciprocal of a number, change its sign and swap the numbers of the numerator and the denominator. So, the opposite reciprocal of [tex]-\frac{9}{2}[/tex] must be [tex]\frac{2}{9}[/tex]. [tex]\frac{2}{9}[/tex] has to be the slope of line g as well.

Answer:

= 2 7/18

Step-by-step explanation:

Follow the PEMDAS order of operations.  

Add and subtract left to right

=43/18 (as an improper fraction)

=2 7/18 (as a mixed number)

Answer:

x=40

Step-by-step explanation:

plz make the other person the brainliest thanks!

Answer:

21 ft²

Step-by-step explanation:

3*5 + 2*3 = 21

Answer:

y=x^2 + 3x - 3

Hope it helped :)

Answer:

Step-by-step explanation:

A triangular prism has three rectangular sides and two triangular faces. To find the area of the rectangular sides, use the formula A = lw, where A = area, l = length, and h = height. To find the area of the triangular faces, use the formula A = 1/2bh, where A = area, b = base, and h = height hope this helped somehow ;-; sry if not

Is their any instructions to what to do?

Answer:

Factor the expressions

Step-by-step explanation:

I'll do one for you

11) x²-11x+30

   x²-5x-6x+30

  x(x-5)-6x+30

  x(x-5)-6(x-5)

solution: (x-5)(x-6)

Answer:

3 pieces

I hope this helps

Step-by-step explanation:

X(1/3) = 1

x/3 = 1

X= 1×3 = 3

Answer:

y+o+u+t+u+b+e +biggie smalls

Step-by-step explanation:

The polygon will be a triangle if the measure of each exterior angle is twice as large as each interior angle.

A polygon is a geometric figure with a finite number of sides in two dimensions. On the sides or edges of a polygon, straight-line segments are joined end to end to form a closed shape. The vertices, also known as corners, are the points where two line segments meet and form an angle.

As we know, the interior angle is given by:

= 180(n - 2)

Sum of the exterior angle is 360 degree

(360/n) = 2[180(n - 2)]/n

360 = 360(n - 2)

n = 3

Number of sides n = 3

Polygon will be a triangle

Thus, the polygon will be a triangle if the measure of each exterior angle is twice as large as each interior angle.

Learn more about the regular polygon here:

brainly.com/question/11810316

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Answer:

Rectangle and also parallelograms as well.

Step-by-step explanation:

Rectangles have two pairs and four right angles. So more than one.

Answer:

-Square

-Rectangle

-Rhombus

Answer:

i dont know  im sorry

Step-by-step explanation:

J = (3,0)

K = (3,negative two)

L = [ 0, negative two]

I apologise for the way this is set out, half of the keys on my laptop do not work

Answer:

J- (3,0)

K- (3,-2)

L- (1,-2)

Reasoning- Just move the points to where it's asking.

Answer:

Are you looking for -6.2?

Step-by-step explanation:

If not let me know!

Step-by-step explanation:

The given relation is :

[tex]y=-0.11x+24.9[/tex] ...(1)

We need to describe this relationship in words.​

The general equation of a line is given by :

y = mx +c ...(2)

comparing equations (1) and (2).

m = -0.11 and c = 24.9

It shows that the slope of the line is -0.11 and the y-intercept is 24.9.

Answer:

i don't know how to explain the answew to you

Step-by-step explanation:

Answer:

Nadia is right

Step-by-step explanation:

if you use cross multiply 3/4 6/8. 8 x 3 = 24, 6 x 4 = 24, the two answer are both 24.

Answer:

9

Step-by-step explanation:

if you mean -3.2x+9 then the answer is 9 because you plug in 0 into x and solve the equation, you get the x intercept