1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Naya [18.7K]
3 years ago
15

12x-20y=108 3x+ky=27 what is k

Mathematics
1 answer:
Sedaia [141]3 years ago
3 0

Let's look at the second equation and try multiplying it by 4:

4 * (3x + ky) = 4 * 27

Which gives us:

12x + 4ky = 108

This looks almost exactly like the first equation except that instead of -20y, there is 4ky. We could try making them equal to each other and solving for k:

-20y = 4ky

-20 = 4k

k = -5

Then, the answer is k = -5.

You might be interested in
HELP ASAP!!! ILL GIVE LOTS OF POINTS AND BRAINLIST<br><br> PLEASE SHOW HOW YOU GOT THE ANSWER!
Kruka [31]

Answer: 27

Step-by-step explanation:

7 0
2 years ago
How do i do this?!?! its due tomorrow helpppppp
3241004551 [841]

Consider for each point how far it is above (or below) the horizontal line y=2. Then plot its image the same distance below (or above) that line.

6 0
3 years ago
The area of a cylinder's base is 706.5 square millimeters. The cylinder's lateral area is 471 square millimeters. What is the to
Rzqust [24]
Just add the two bases plus the lateral area. so it would be 706.5+706.5+471.
8 0
3 years ago
Read 2 more answers
HELP PLEASE I DON'T UNDERSTAND
liraira [26]
If I counted correctly, the answer would be 52/150. You just need to simplify the fraction. I'll recount soon, and update if it changes.
3 0
3 years ago
Read 2 more answers
El precio de las acciones en tecnologia era $9.69 el día de ayer. Hoy el precio bajó a $9.58. Hallar el porcentaje de disminució
sesenic [268]

(9.69-9.58):9.58*100 =

(9.69:9.58-1)*100 =

101.14822546973-100 = 1.1

Eso sería una disminución de 1.1

O como porcentaje redondeado 1.14%.

Espero eso ayude!

8 0
3 years ago
Other questions:
  • There are 200 end of the year school dance tickets available. Students who have perfect attendance are able to purchase them in
    5·1 answer
  • One more math question! Thanks!
    8·2 answers
  • Okay, so what is 1 + 1 = ? Whoever answers it in the past 24 hours gets 5 stars!∩
    14·1 answer
  • How would you solve this?
    15·1 answer
  • A study found that the mean amount of time cars spent in drive-through of a certain fast-food restaurant was 136.6400 seconds. A
    13·1 answer
  • 88.1-2.3f=72.46 how do you find f
    14·2 answers
  • A Demolition ball weigths 2 tons . what is the weigtht in ounces?also what is a demolition ball?
    12·1 answer
  • Product of -28 and sum of 3
    14·2 answers
  • A little bit of help here??
    10·1 answer
  • Suki rode her bike 6/7 mile. Claire rode her bike 1/3 mile. They want to compare how far they each rode their bikes using benchm
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!