All categories

3 years ago

1.) 3x + 5y = 15 2.) 2x 4y = 2 3.)18x + 12y = 24

Mathematics

1 answer:

DiKsa [7]3 years ago

4 0

1). Answer x= -5/3 y + 5

2.) x=2y+1

3.)x=−2/3y+4/3

You might be interested in

For what value of x is the equation 6x-15=x+85

Sunny_sXe [5.5K]

Step-by-step explanation:

please give me brainlest

5 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=%5Cboxed%7B%5Cblue%7B%5Cmathscr%7BHello%5C%3ABrainliacs%7D%7D%7D" id="TexFormula1" title="\box

andrew-mc [135]

For the reaction,

$CO(g) + H_2 O(g) = CO_2(g) + H_2(g)$

Initial concentration:

0.1M , 0.1M , 0 , 0

Let 'x' mole per litre of each of theproduct be formed.

At equilibrium:

(0.1 – x)M , (0.1 – x)M , xM , xM

where x is the amount of Carbon dioxide and Hydrogen, at equilibrium.

Hence, equilibrium constant can be written as,

$K_c = \frac{x²}{(0.1 – x)²} = 4.24$

→ x² = 4.24 (0.01 + x² – 0.2x)

→ x² = 0.0424 + 4.24 x² - 0.848x

→ 3.24x² - 0.848x + 0.0424 = 0

a = 3.24, b = -0.848, c = 0.0424

(for quadratic equation ax² + bx+c=0)

$x = \frac{( - b \: ± \: \sqrt{ {b}^{2} - 4ac) } }{2a}$

$= > x = \frac{ - ( - 0.848 \: ± \: \sqrt{( - 0.848)^{2} - 4(3.24)(0.0424) } }{2 \times 3.24}$

$= > x = \frac{ - 0.848±0.4118}{6.48}$

$x_1 = \frac{0.848 - 0.4118}{6.48} = 0.067$

$x_2 = \frac{0.848 + 0.4118}{6.48} = 0.194$

Here, the value 0.194 should be neglected because it will give concentration of the reactant which is more than initial concentration.

∴ The equilibrium concentrations are :-

$[CO_2] [H_2] = x = 0.067M$

$[CO] [H_2 O] = 0.1 - 0.067 = 0.033M$

7 0

3 years ago

Angle ABC and Angle DBE are vertical angles. Angle ABC measures (7x - 5) degrees and Angle DBE measures -2(x - 11) degrees. What

Snezhnost [94]

You have to find out what X is which you need to do -2 - (-11) and then do -9 - (-11) after that do you-2 x -2 and get -4

4 0

3 years ago

What is the recursive rule for an=2n+11?

Dmitrij [34]

The answer is B
a1= 13;an-1+2

6 0

4 years ago

Read 2 more answers

Which is the solution to the equation below? -3=t- 12 A-9 C 9 B 4 D 15

omeli [17]

ANSWER:
9 (C)

hope this helps

4 0

3 years ago

1.)­ 3x + 5y = 15 2.) 2x ­ 4y = 2 3.)18x + 12y = 24

1.) 3x + 5y = 15 2.) 2x 4y = 2 3.)18x + 12y = 24