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3 years ago

NEED HELP FAST 15 POINTS

Mathematics

2 answers:

Flauer [41]3 years ago

6 0

Answer:Can somebody please help

Step-by-step explanation:

garik1379 [7]3 years ago

3 0

Answer:

Given system of inequalities,

-2x + 3y > 3,

4x - 3y < 15,

Graphing -2x + 3y > 3 :

Related equation of line -2x + 3y = 3,

If x = 0,

-2(0) + 3y = 3 ⇒ 3y = 3 ⇒ y = 1,

If y = 0,

-2x + 3(0) = 3 ⇒ -2x = 3 ⇒ x = -1.5,

'>' represents the dotted line,

Join the points (0, 1) and (-1.5, 0) by dotted line.

For (0, 0), -2(0) + 3(0) > 3 ( False )

Shaded region will not contain the origin.

Graphing 4x - 3y < 15 :

Related equation of line 4x - 3y = 15

If x = 0,

4(0) - 3y = 15 ⇒ -3y = 15 ⇒ y = -5,

If y = 0,

4x - 3(0) = 15 ⇒ 4x = 15 ⇒ x = 3.75,

'<' represents the dotted line,

Join the points (0, -5) and (3.75, 0) by dotted line.

For (0, 0), 4(0) - 3(0) < 3 (True )

Shaded region will contain the origin.

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I need answers to this

ololo11 [35]

Answer:

x = -5, and y = -6

Step-by-step explanation:

Suppose that we have two equations:

A = B

and

C = D

combining the equations means that we will do:

First we multiply both whole equations by constants:

k*(A = B) ---> k*A = k*B

j*(C = D) ----> j*C = j*D

And then we "add" them:

k*A + j*C = k*B + j*D

Now we have the equations:

-x - y = 11

4*x - 5*y = 10

We want to add them in a given form that one of the variables cancels, so we can solve it for the other variable.

Then we can take the first equation:

-x - y = 11

and multiply both sides by 4.

4*(-x - y = 11)

Then we get:

4*(-x - y) = 4*11

-4*x - 4*y = 44

Now we have the two equations:

-4*x - 4*y = 44

4*x - 5*y = 10

(here we can think that we multiplied the second equation by 1, then we have k = 4, and j = 1)

If we add them, we get:

(-4*x - 4*y) + (4*x - 5*y) = 10 + 44

-4*x - 4*y + 4*x - 5*y = 54

-9*y = 54

So we combined the equations and now ended with an equation that is really easy to solve for y.

y = 54/-9 = -6

Now that we know the value of y, we can simply replace it in one of the two equations to get the value of x.

-x - y = 11

-x - (-6) = 11

-x + 6 = 11

-x = 11 -6 = 5

-x = 5

x = -5

Then:

x = -5, and y = -6

5 0

3 years ago

The probability of drawing a yellow or green marble out of a bag containing 3 blue, 2 green , 8 yellow , 4 red , and 3 orange ma

WINSTONCH [101]

Answer:

$\frac{10}{23}$

Step-by-step explanation:

add green and yellow which is 10 over the whole thing which is 23

5 0

3 years ago

Item 12

kozerog [31]

Answer:

The height is 4.472

Step-by-step explanation:

That formula is Heron's formula.

Where "s" is calculated like this:

s = (a + b + c) / 2

In this case:

a = 14

b = 12

c = 6

replacing:

s = (14 + 12 + 6) / 2

s = 16

Now we calculate the area:

A ^ 2 = 16 * (16−14) * (16−12) * (16−6)

A ^ 2 = 1280

A = 35.777

The area of the triangle is:

A = b * h / 2

In this case we will take the base as the longest side of the triangle, that is to say = 14

Thus:

h = A * 2 / b

h = 35.777 * 2/16

h = 4.472

So the height is 4.472

4 0

3 years ago

S=2(3.14)zx+4(3.14)z^2

kirill115 [55]

Answer:

what do you want to solve for?

Step-by-step explanation:

3 0

2 years ago

Identify all factors of the expression 12x^2-14x-6

Evgen [1.6K]

Let's solve this by using the quadratic formula:

$\frac{-b+-\sqrt{b^2-4ac} }{2a}$

Note that we only use the coefficients so a=12, b=-14, and c=-6.

Plug values in the quadratic equation:

$\frac{ - ( - 14)± \sqrt{ {( - 14)}^{2} - 4(12)( - 6) } }{2(12)}$

And so by evaluating those values we obtain:

$\frac{14+-\sqrt{484} }{24}=\frac{14+-22}{24} \\\\$

Now we have two answers which are our factors one where we add another where we subtract and so:

First factor:

$\frac{14+22}{24}=\frac{36}{24}=\frac{3}{2}$

Second Factor:

$\frac{14-22}{24}=\frac{-8}{24}=-\frac{1}{3}$

And so your factors are

$\frac{3}{2},-\frac{1}{3}$

meaning that those are your roots/x-intercepts.

6 0

3 years ago