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]
4 years ago
5

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

Mathematics
1 answer:
mixer [17]4 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
Help!<br><br> Please look at the pic and help me!
inna [77]

Answer:

36

Step-by-step explanation:

equilateral triangle has all sides So,

perimeter = a+b+c= 12+12+12=36

5 0
3 years ago
Read 2 more answers
Please help! picture attached :)
Radda [10]

Answer:

y=-3x+4

Step-by-step explanation:

im assuming that you need the equation of the table

to find slope, y2-y1/x2-x1    10-4/-2-0

6/-2=-3   slope=-3  

y=mx+b   just sub in the numbers from a point in the table

10=-3(-2)+b

10=6+b

b=4

y=-3x+b

4 0
2 years ago
HELP! BRAINLIEST! AHJHHHHHH
zalisa [80]

Answer:

129.5 Square feet is the correct answer.

Step-by-step explanation:

I am a 100% SURE of that.

Hope this helps....

Have a nice day!!!!

7 0
3 years ago
The length of a shadow of a building is 28m. The distance from the top of the building to the shadow is 38m. Find the height of
AlexFokin [52]
It appears that the Pythagorean theorem can be applied to this problem
  (distance to shadow)² = (height of building)² + (length of shadow)²
  (38 m)² = (height of building)² + (28 m)²
  660 m² = (height of building)²
Then the height of the building is
  height of building = √660 m ≈ 25.7 m
7 0
3 years ago
What angle in degrees has a sine of approximately 0.5736???
statuscvo [17]

Answer:

35º

Step-by-step explanation:

90-55 = 35º

6 0
3 years ago
Read 2 more answers
Other questions:
  • The solution to 4+16=-5(4x-4)
    13·2 answers
  • -5+2(10b-2)=31 need help thanks!
    6·2 answers
  • A mountain road is 5 miles long and gains elevation at a constant rate. After 2 miles, the elevation is 5500 feet above sea leve
    13·2 answers
  • The sum of two positive numbers is 12. what two numbers will maximize the product g
    11·1 answer
  • The Luxor hotel, in Las Vegas, is a square pyramid with lateral faces consisting of black, glassed mirrored panes. The building
    10·1 answer
  • The extremes in the proportion 3/4=15/20 are
    8·2 answers
  • Trong mặt phẳng toạ độ Oxy, cho tam giác ABC với A(-1;2), B(3;2), C(1;4.Viết phương trình đường thẳng d chứa đường cao kẻ từ đỉn
    12·1 answer
  • Jessica bakes 112 muffins in 7 batches. How many muffins does each batch contain?
    10·1 answer
  • Equivalent for -5v+(-2)+1+(-2v)
    12·1 answer
  • (−t 3 +5t 2 −6t)+(8t 2 −8t)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!