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
garri49 [273]
3 years ago
10

HELP I DONT GET IT!!!For the system below solve using linear combinations method 2a+3b=1 and -2a+b=11

Mathematics
2 answers:
son4ous [18]3 years ago
6 0
Because it using subtraction on one and multiply on the other
Maksim231197 [3]3 years ago
3 0
Linear combination method just means to add the equations so that one variable with cancel. In this case the a values are already set up so that they will cancel.
2a + 3b = 1
-2a + b = 11
4b = 12
b = 3

now put 3 back into either of the original equations and solve for a.
2a + 3(3) = 1
2a + 9 = 1
2a = -8
a = -4
(-4,3)
You might be interested in
Given the circle with the equation (x - 3)2 + y2 = 49 , determine the location of each point with respect to the graph of the ci
Nana76 [90]
Hello : 
<span>(x - 3)² + y² = 7²
the center is : A(3 , 0 ) and radius   r = 7  
the </span> point D  is on the interior  if : AD <span>< 7
</span>the  point D  is on the exterior if :  AD > 7
 the  point D  is circumference of the circle if :AD = 7 
3 0
3 years ago
What is the formula of finding Total Surface Area and Lateral Surface Area of a Cuboid ? ​
7nadin3 [17]

Answer:

Formulas for Lateral Surface Area Lateral Area for Cuboid and Cube The Total surface area of a cuboid is given by 2 (length. breadth + breadth. height + height. length) = 2 × (lb + bh + hl). The total surface area of a cube is given by 6 × (side) 2.

Step-by-step explanation:

CAN I GET BRAINLIEST

7 0
3 years ago
Read 2 more answers
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
leva [86]

Left side

Radius - 17 cm

Diameter - 24 cm

Right side

Radius - 25 mm

Diameter - 50 mm

7 0
3 years ago
Read 2 more answers
Please explain I really need help
velikii [3]

Answer:

1. 1343 years

2. 9 hours

3. 39 years

Step-by-step explanation:

1. Given, half-life of carbon = 5730 years.

∴ λ = 0.693/half-life of carbon = 0.693/5730 = 0.000121

If N₀ = 100 then N = 85

Formula:- N = N₀*e^(-λt)

∴ 85 = 100 * e^(-0.000121t)

∴㏑(-0.85)=-0.000121t

∴ t = 1343 years

2. Given half-life of aspirin = 12 hours

λ = 0.693/12 = 0.5775

Also N₀ = 100 then 70 will disintegrate and N = 30 will remain disintegrated.

∴ 70 = 100 *e^(-0.05775t)

0.70 = e^(-0.05775t)

㏑(0.70) = -0.05775t

∴ t = 9 hours

3.  The population of the birds as as A=A₀*e^(kt)

Given that the population of birds fell from 1400 from 1000, We are asked how much time it will take for the population to drop below 100, let that be x years.

The population is 1400 when f = 0, And it is 1000 when f = 5

We can write the following equation :

1400 = 1000e^(5t).

∴1400/1000 = e^(5k)

∴ k = ㏑(1.4)/5

We need to find x such that 1400/100 = e^(xk)

14 = e^(xk)

∴ x = 39 years

5 0
3 years ago
1. A storage trunk is 3 feet long and 1 foot wide. The height of the trunk is 2 feet. What is the volume of the trunk?​
Alex_Xolod [135]
It’s 6 feet I believe
4 0
3 years ago
Other questions:
  • Clark and Lana take a 30-year home mortgage of $128,000 at 7.8%, compounded monthly. They make their regular monthly payments fo
    9·1 answer
  • there are 3 boys for every 4 girls in mrs smiths class if there are 28 students in the class how many girls and how many boys ar
    11·2 answers
  • PLZ HELP ASAP
    14·2 answers
  • What is the measure of ZABD?​
    14·1 answer
  • Miah has a fish tank were she keeps her fish! Find the volume of the fish tank
    12·1 answer
  • Tell whether the angles are complementary or supplementary.
    5·2 answers
  • The mean of the following numbers is 15. 14,10,18,,21,15,14​
    14·1 answer
  • If someone could pls help me with this that would be great!!
    10·1 answer
  • the volume of the cone is 270πcm³. the height of the cone 10cm. work out the volume of the solid shape. give your answer in term
    13·1 answer
  • The figure shows two triangles on the coordinate grid: A coordinate grid is shown from positive 6 to negative 6 on the x-axis an
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!