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
Nataliya [291]
3 years ago
5

4a + 6b= 10 2a - 4b =12 what does 12a=

Mathematics
1 answer:
mixer [17]3 years ago
3 0
4a + 6b = 10
2a - 4b = 12...multiply by -2
----------------
4a + 6b = 10
-4a + 8b = - 24 (result of multiplying by -2)
------------------add
14b = - 14
b = -14/14
b = -1

2a - 4b = 12
2a - 4(-1) = 12
2a + 4 = 12
2a = 12 - 4
2a = 8
a = 8/2
a = 4

so 12a = 12(4) = 48 <==
You might be interested in
Caroline's car used 16 gallons to travel 544 miles. How far can she travel on 9 gallons?<br> ​
kicyunya [14]

Answer:

306 gallons

Step-by-step explanation:

Caroline traveled 544 miles on 16 gallons. We do some simple math and divide 544/16 and receive 34 miles/gallon. All we do now is multiply 34 * 9 and we receive 306 gallons.

8 0
2 years ago
To create voltage in a battery, you need a difference in potential between compounds. What is the difference between the zinc po
Novosadov [1.4K]

Answer:

  -1.17 volts

Step-by-step explanation:

The difference between "a" and "b" generally means "a-b". Here, the difference between the potentials is ...

  -0.41 V - 0.76 V = -1.17 V

_____

Sometimes, when we talk about the difference, we mean the positive difference. If that is what is intended here, it is 1.17 volts.

6 0
3 years ago
PLS HELP! Whoever gets it right will get brainliest!!
melomori [17]

Answer:

4

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
I need help with this i need to find the grey area
IrinaVladis [17]

Answer:

y < 4x - 2

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
If u=6 feet, v=7 feet, w=4 feet, x=6 feet, y=12, and z=3 feet, what is the area of this object?
eimsori [14]

Answer:

D. 62 square feet

Step-by-step explanation:

uz + wx + (v+z)(y-u-w)

6*3 + 4*6 + (7+3)(12-6-4)

18 + 24 + 20 = 62

7 0
3 years ago
Other questions:
  • For the differential equation s′′+bs′+6s=0, find all the values of b that make the general solution overdamped, those that make
    6·1 answer
  • I need help.What do I do?
    13·2 answers
  • Any help please? :( i really need it
    9·2 answers
  • Which equation listed below, when solved, shows how to find the circumference of a circle if the diameter is 6 inches? Use 3.14
    6·2 answers
  • 12. Jeremy has $10.00 in quarters to spend on candy. What
    13·2 answers
  • Can you show the work
    8·1 answer
  • How many different areangements can be made with the word space
    10·1 answer
  • The temperature is 60 F. The temperature will decrease by 3 F each hour. Let h be the number of hours. When will the temperature
    14·1 answer
  • Rounded to the nearest tenth, approximately how many ounces is 82.4 kilograms?
    15·1 answer
  • A parallelogram has an area of 288 square centimeters and a height of 12 centimeters.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!