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Gemiola [76]
3 years ago
11

What would be the best first step to solve this (4x-9x)(12+8x)=9(4x)

Mathematics
1 answer:
marin [14]3 years ago
8 0

Answer:

open the brackets is the first step

Step-by-step explanation:

4x(12 + 8x) -9x( 12+8x) = 36x

48x + 32x^2 -108x -72x^2 =36x

32x^2 - 72^2 + 48x - 36x - 108x = 0

-40x^2 -96x = 0

find x using quadratic formular

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A line that includes the points (9,
IceJOKER [234]
Your numbers are all over the place, I will assume that you are saying that the slope is 13.

Looking at the formula for calculating slope/gradient, it is Rise/Run. 
Rise/Run = y2 - y1 divided by x2 - x1. The reason for this is because if you minus one y value from the other y value you get the difference in values which is the rise, and if you minus one x value from the other x value you get the difference in value  which is the run. 

So by using this formula, you get:
 
(7 - 6) / (v - 9) = 13
Therefore 1/(v - 9) = 13
If you multiply both sides by (v-9), you get 1= 13v - 117
you rearrange it to 13v = 118
If you divide by 13, you get your answer = 9.0769

You can check your answer by putting this value back into the gradient formula.
 
(7-6)/(9.0769-9) 
=13.004
7 0
3 years ago
An art teacher is pouring paint into containers that each hold 1/2, gallon. How many
irina1246 [14]

Answer:

10 gallons

Step-by-step explanation:

Multiply 20 by 1/2.

20 x 1/2 = 10

Hope it helps!

Let me know if it doesn't, I can make it right.

5 0
2 years ago
HELP!!!<br> what is x?<br> x2/4*=50
Gnoma [55]
Hello there. 

THe answer is x=100.

Plz branliest
5 0
3 years ago
Read 2 more answers
Theresa Morgan, a chemist, has a 30% hydrochloric acid solution and a 50% hydrochloric acid solution. How many liters of each sh
Bogdan [553]
Let x represent the number of liters of 50% acid Theresa puts into the mix. The the number of liters of 30% acid will be (420-x). The total amount of acid in the final solution will be ...
  0.50x + 0.30(420-x) = 0.45(420)
  0.20x + 126 = 189 . . . . . . . . . . . . . . . simplify
  0.20x = 63 . . . . . . . . . . . . . . . . . . . . . subtract 126
  x = 63/0.20 = 315 . . . . . . . . . . . . . . . liters of 50% solution
  (420-x) = 420-315 = 105 . . . . . . . . . liters of 30% solution

Theresa should mix ...
  105 liters of 30% solution
  315 liters of 50% solution
7 0
3 years ago
The answer to eaquivalent fraction 1×2/3×4 answer.
zhuklara [117]
The answer Is 2/12 because if u multiply 1 x2 it is 2 then 3 x4 which is 12
6 0
3 years ago
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