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
Agata [3.3K]
3 years ago
6

Solve the system of equations 3x – 3y = 30 and 2x + y = 11 by combining the equations.

Mathematics
1 answer:
Andreas93 [3]3 years ago
6 0
Times bottom equation by 3 and top by 2 to get the same coefficient of x
6x-6y=60
6x+3y=33
Minus the bottom by the top
-9y=27
y=-3
substitute this in to one of the equations
2x -3 = 11
add 3 to both sides
2x=14
x=7
You might be interested in
The number of bacteria in a culture is given by the function n(t) =950e^0.45t Where t is measured in hours A) what is the contin
tatiyna

Answer:

a) The continuous rate of growth of this bacterium population is 45%

b) Initial population of culture at t = 0 is 950 bacteria

c) number of bacterial culture contain at t = 5 is 9013 bacteria

Step-by-step explanation:

The number of bacteria in a culture is given by

n(t) = 950e^{0.45t}

a) rate of growth is

Bacteria growth model N(t) = noe^{rt}

Where r is the growth rate

hence r = 0.45

              = 45%

b) Initial population of culture at t = 0

n(0) = 950e^{0.45(0)}

       = 950e^{0}

       = 950 bacteria

c) number of bacterial culture contain at t = 5

n(5) =  950e^{0.45(5)}

      = 950e^{2.25}

      = 9013.35

      = 9013 bacteria

6 0
3 years ago
Find cos B 52 b 65 a 39​
KonstantinChe [14]

Answer:

hi

Step-by-step explanation:

i think it is 52/65

hope it helps

have a nice day

5 0
3 years ago
Which angle relationship alone could be used as a reason that two angles are congruent?
zimovet [89]

Supplementary angles

7 0
3 years ago
Henry has a total of 26 quarters and dollars in his pocket. They're worth $17. How many of each type of coin
hodyreva [135]
I’m pretty sure the answer is D.
8 0
3 years ago
Which set of numbers is in order from smallest to largest?
galina1969 [7]

Answer:

0.5, 80%

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Do this correctly I will mark brainiest Answer the two questions!
    13·2 answers
  • What is the answer to:<br><br>3(3x-4)-2(2x-1)
    6·2 answers
  • What is the value represented by the letter A on the box plot of data?
    11·2 answers
  • Which of these quardinates could be the<br> Y intercept of this graph
    13·1 answer
  • Paul can walk 15 steps in 5 minutes. How long does it take Paul to walk 75 steps at the same speed? I got 25 minutes am i right?
    13·2 answers
  • I dont under stand what 5/8 - 2/4
    13·1 answer
  • What is tan 60?<br><br> A. v3<br> B. v3/2<br> C. 1/2<br> D. 1/v3<br> E. 2/v3<br> F. 1
    7·2 answers
  • Find the common difference of the arithmetic sequence 13,10,7
    14·1 answer
  • What is the value of x and the measure of ∠DBC, respectively?
    8·2 answers
  • Right triangle similarity: Solve for x and y
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!