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
alexandr402 [8]
3 years ago
14

4. Which of these are solutions to the following system of equations?

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
5 0

Answer:

Step-by-step explanation:

We have to check each one answer in the following system:

x - 2y = 7

13x + 7y = 8

a. (7,0)

7 - 2.0 = 7 (it's true)

13.7 + 7. 0 = 8 (it's false)

It isn't a correct answer.

b. (5, -1)

5 - 2.(-1) = 7 (correct)

13.5 + 7 (-1) = 8 (wrong)

It isn't a correct answer.

c. (-2,2)

-2 - 2.2 = 7 (wrong)

d. (3, -2)

3 - 2. (-2) = 7 (correct)

13.(3) + 7.(-2) = 8 (wrong)

So, none of them is answer.

You might be interested in
Help plzz i will give you brianliest Which best describes the graph of the function f(x) = 3(1.8)^x A) The graph passes through
DanielleElmas [232]

Answer:

Step-by-step explanation:

Start with why C isn't the answer.

y = 1.8^0 . The power is zero. Anything to the zero power (anything except 0 to the 0 power) is 1. So 1.8^0 is 1 not something else. C assumes that somehow 0,1.8 turns into 1.8. It does not. The second part is also wrong but you don't need it. However here it is.

x = 0        y = 3

x = 1         y = 3 * 1.8 = 5.4

x = 2        y = 3 * 1.8^2 = 3*3.24 = 9.72

You should be able to see that if you multiply 5.4 by 3, you don't get 9.72

C just does not work.

=======

The actual answer is A. That's exactly what the graph does. If you multiply 5.4 * 1.8 you should get 9.72. Just for completeness, I've included the graph.

6 0
3 years ago
Someone answer this please
irina [24]

Answer:

y = - 27/5

Step-by-step explanation:

4(3) - 5y = 39

12 - 5y = 39

-5y = 39 - 12 = 27

y = - 27/5

7 0
2 years ago
Imma give brainliest just help me
ruslelena [56]

Answer: 3:4

Step-by-step explanation: because the ratio of a :b is 2:3 which means b is 3 . And the ratio of a:c is 3 :4 which means c is 4.

And 3:4 is in simplest form .

Hope it helps.

5 0
2 years ago
Read 2 more answers
6% of $120 find percent<br> 0.5% of $44 find percent
just olya [345]
.06*120=$7.20
.005*44=$0.22
6 0
3 years ago
Read 2 more answers
What is the answer please help me no links I will report because it’s not ok
Pepsi [2]
Answer: 150 minutes
5 0
2 years ago
Other questions:
  • Is 100mm or 1dm GREATER LESS THAN OR EQUAL?
    8·2 answers
  • A coin is tossed twice what is the probability of the coin landing heads up both times
    6·1 answer
  • Simplify the following expression.<br> 938 + (-158)
    9·2 answers
  • Warm-up for you! Get your brain ready! 50 points! You got this!
    5·1 answer
  • How many feet tall is the taller tree?
    10·1 answer
  • Solve.<br> √ x + 4 = x - 2<br> A.5<br> B. -2,3<br> C.10<br> D.no real number solution
    7·1 answer
  • Helllppppp Asapppp.
    10·1 answer
  • 81a raised to the power of 2 minus 25
    12·2 answers
  • This if for my study guide and I'm so confused, can someone help me with this one?
    6·1 answer
  • DO THESE ON A PIECE OF PAPER! PLEASE HELP! QUICK!!DO ALL OF THEM!!!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!