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
SIZIF [17.4K]
4 years ago
9

If a+3b=13 and a+b=5 the value of b is

Mathematics
1 answer:
AlladinOne [14]4 years ago
6 0

Answer:

b = 4

Step-by-step explanation:

a + 3b = 13

a + b = 5 .....multiply by -1

=============

a + 3b = 13

-a - b = -5 (result of multiplying by -1)

=============add

2b = 8

b = 8/2

b = 4 <====

a + b = 5

a + 4 = 5

a = 5 - 4

a = 1

You might be interested in
Calculate the areas of these rectangles
kykrilka [37]
  • <em>Answer:</em>

<em>A(a) = 24 cm²</em>

<em>A(b) = 40.04 cm² ≈ 40 cm²</em>

  • <em>Step-by-step explanation:</em>

<em>Hi there ! </em>

<em>area formula (rectangle)</em>

<em>A = l × w</em>

<em>A(a) = 8cm × 3cm = 24 cm</em>

<em>A(b) = 5.2cm × 7.7cm = 40.04 cm² ≈ 40 cm²</em>

<em>Good luck !</em>

8 0
3 years ago
The interest on an investment varies directly as the rate of interest. If the interest is ​$43 when the interest rate is 5​%, fi
Alenkasestr [34]

The answer is $43 * 6.6% = 2.838

5 0
3 years ago
Compare A and B in three​ ways, where A=1.84 million is the 2012 daily circulation of newspaper X and B=2.26 million is the 2012
gavmur [86]
C Complete the sentence a is _____ percent of b
6 0
3 years ago
Read 2 more answers
A passenger train has tickets available for 12 window seats and 8 aisle seats. The next person to buy a ticket will be randomly
Svetradugi [14.3K]

Answer:

2/5

Step-by-step explanation:

There is an 8/20 chance that the next person will receive a window seat. You simplify that probability to get your answer. 8/20 becomes 2/5. So the answer is 2/5.

7 0
3 years ago
What is 2/3 + 3/4 + 5/6 + 4/8 + 3/12 + 3/2​
Stella [2.4K]

Answer:

9/2

Step-by-step explanation:

2/3 + 3/4 + 5/6 + 4/8 + 3/12 + 3/2 =

= 16/24 + 18/24 + 20/24 + 12/24 + 6/24 + 36/24

= 108/24

= 54/12

= 9/2

3 0
3 years ago
Other questions:
  • Need help with this drug calc problem! Number 29
    15·1 answer
  • Fill in the blanks. In the 30-60-90 triangle below, side s has a length of ___________ and side q has a length of ___________.
    10·2 answers
  • YW bisects &lt;XYZ. m&lt;XYW=(2x+7) and m&lt;XYZ= (6x-8). find the value of the X and the measure of &lt;XYZ
    10·1 answer
  • A rectangular box has a length of 8 feet and a width of 2 feet. The length of the three-dimensional diagonal is 10 feet. What is
    6·1 answer
  • Fill in the blanks-
    10·1 answer
  • ¿Cuál es la fórmula para calcular el área de cualquier triangulo?
    9·1 answer
  • State a conclusion that seems reasonable.
    6·2 answers
  • determine if the following triangles are similar, and if so which postulates or theorem proves they are similar​
    9·1 answer
  • Help me ASAP for this question.
    13·2 answers
  • What is the m &lt; BDC?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!