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
AURORKA [14]
3 years ago
15

2a + b = 3 and a - 3b = 5

Mathematics
1 answer:
vfiekz [6]3 years ago
6 0

Answer:

a= 2 b=-1

Step-by-step explanation:

a-3b=5

or, a= 5+3b_(i)

substituting value of a in 2a+b=3,

2×(5+3b)+b=3

or, 10+6b+b=3

or, 7b=3-10

or, 7b=-7

b= -1

substituting value of b in(i),

a=5+3b

=5+3×(-1)

=5-3

=2

You might be interested in
Lewis paid $13.55 for a beach chair and $5.75 for a book. How much did Lewis spend?
BartSMP [9]

Answer:

$19.30

Step-by-step explanation:

Add $13.55+5.75= $19.30

7 0
3 years ago
Read 2 more answers
A ) If f(x) = x^3-7/2, find f^-1(x)<br> b ) find f^-1(28.5)
Lina20 [59]

Step-by-step explanation:

The solution is more detailed

7 0
3 years ago
For a craft , each student will need 5 rubber bands . There are 8 students . Rubber bands comes in bags of 9 . How many bags wil
bixtya [17]
You would need 5 bags
8 0
3 years ago
Read 2 more answers
Consider the following random experiment. First, roll a die and observe the number of dots facing up; then, toss a coin the numb
kipiarov [429]

Answer:

{(1, 0), (1, 1), (2,0), (2,1), (2, 2), (3,0), (3,1), (3,2), (3,3), (4, 0), (4,1), (4,2), (4,3), (4,4), (5,0), (5,1),(5,2), (5,3), (5,4), (5,5), (6,0), (6,1),(6,2), (6,3), (6,4), (6,5), (6,6)}

B.)

{(2,2), (3,2), (4,2), (4,4), (5,2), (5,4), (6,2), (6,4), (6,6)}

Step-by-step explanation:

Sample space :

Die roll, then number of coin tosses based on the outcome of the die roll, then number of heada from the toss(es) is recorded along with the outcome of the die roll.

{(1, 0), (1, 1), (2,0), (2,1), (2, 2), (3,0), (3,1), (3,2), (3,3), (4, 0), (4,1), (4,2), (4,3), (4,4), (5,0), (5,1),(5,2), (5,3), (5,4), (5,5), (6,0), (6,1),(6,2), (6,3), (6,4), (6,5), (6,6)}

Event that the total number of head is even:

{(2,2), (3,2), (4,2), (4,4), (5,2), (5,4), (6,2), (6,4), (6,6)}

3 0
2 years ago
Brianna has 4 pink bracelets. One third of all her bracelets are pink. How many braclets does Brianna have?
liq [111]
Brianna has 12 braclets
3 0
3 years ago
Read 2 more answers
Other questions:
  • Rebecca's dog runs with an initial speed of 1.5m/s on a waxed floor. It slides to a stop within an acceleration of -.25 m/s/s. H
    5·1 answer
  • slyes grandparents invest $1500 in a college account earns 4.9% intrest that is compound annually. how much money will be in the
    8·1 answer
  • The circle below has an area of 314 square centimeters, and the square inside the circle has a side length of 2 centimeters. A c
    12·1 answer
  • -4(2x - 5) – (7 – 3x) = 4(x + 3)
    7·2 answers
  • Stephanie ran 1 lap in 6 minutes at this rate how far would she run in 30 minutes
    9·1 answer
  • What is 0.6(10n+25)=10+5n
    12·1 answer
  • When you flip a biased coin the probability of getting a tail is 0.35.
    9·1 answer
  • I am just wondering if this is a function or not a function​
    14·2 answers
  • X^2-x+2=0<br> Please use the quadratic formula
    6·1 answer
  • Hector spent $30.45 for 2 DVDs, the sales tax was $2.85, and he didn't have a coupon. Each DVD cost the same amount. How much wo
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!