All categories

3 years ago

3x +5 = 2x+8 how do i solve?

Mathematics

1 answer:

Blababa [14]3 years ago

4 0

Answer,

X = 3

Explanation,

Subtract 5 from both sides.

3x+5-5=2x+8-5

Simplify.

3x=2x+3

Subtract 2x from both sides.

3x-2x=2x+3-2x

Simplify.

x=3

Hope this helps :-)

You might be interested in

Pls help me, I really dont understand

Stella [2.4K]

Answer:

-2.5x-.5

$y=\frac{2}{3}x-1$

draw the dotted line (3/7)x-3 and shade below it

Step-by-step explanation:

First, we need the slope

Use the slope formula:

$\frac{Y_2-Y_1}{X_2-x_1}=\frac{2-(-8)}{-1-3}=\frac{10}{-4}=-2.5$

so we have

y= -2.5x+b

Solve for b by plugging in coordiantes

-8= -2.5(3)+b

-8= -7.5+b

b= -.5

Put it together and get -2.5x-.5

2.)

A line is parallel to another line if they have the same slope (and different y intercepts)

So in the formula y=mx+b we knowe that m= 2/3

Now it's just a matter of solving for B

plug in the required coordinate to do this

-1=(2/3)*0+b

-1= b

Put it all together to get

$y=\frac{2}{3}x-1$

3.)

put this into slope intercept form

3x-7y>21

3x-21 > 7y

(3/7)x-3 >y

To graph this just draw a dotted line with the equation (3/7)x-3 and shade everything below it (use de_smos if you're stuck)

7 0

4 years ago

5 -2x + 6y= -38 ? 3x – 4y = 32 •(-4, - 5) •(-5, 4) •(1, – 6) (4, - 5)

Svet_ta [14]

Answer:

Option D (4, -5)

Step-by-step explanation:

This question can be solved by various methods. I will be using the hit and trial method. I will plug in all the options in the both the given equations and see if they balance simultaneously.

Checking Option 1 by plugging (-4, -5) in the first equation:

-2(-4) + 6(-5) = -38 implies 8 - 30 = -38 (not true).

Checking Option 2 by plugging (-5, 4) in the first equation:

-2(-5) + 6(4) = -38 implies 10 + 24 = -38 (not true).

Checking Option 3 by plugging (1, -6) in the second equation:

3(1) - 4(-6) = 32 implies 3 + 24 = 32 (not true).

Since all the options except Option 4 have been ruled out, therefore, (4,-5) is the correct answer!!!

7 0

3 years ago

Find the slope and y-intercept and tell me if its proportional or non-proportional.

weqwewe [10]

Answer:

Slope: 6

Y-intercept: 0

Proportional

Step-by-step explanation:

The equation for this table is y = 6x + 0 or just y = 6x.

y = 6x + 0

y-value slope (x-value) y-intercept

Proportional because it crosses (0,0) on the graph.

6 0

3 years ago

DJ movie collection is constantly crying you already had a large number of movies but his friend just gave him a donation that w

Veronika [31]

Step-by-step explanation:

lol! thanks for the point

hehehehehehehe

8 0

3 years ago

what is the answer to this question 44/99 x 22/99

sdas [7]

Answer:

8/81

hope helps~

∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆∆

8 0

3 years ago