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
olganol [36]
3 years ago
15

Solve each system of equations by adding.

Mathematics
1 answer:
Archy [21]3 years ago
8 0

Answer:

3.  x+y = -1

    x-y = 7

(x+x+y-y) 2x=6

x=3

4. 2x+2y = -2

   3x-2y = 12

(2x+3x+2y-2y) 5x=-2+12

5x=10

x= 2

5. 6x+5y = 4

  -6x+7y = 20

(6x-6x+5y+7y)= 4+20

12y=24

y=2

You might be interested in
Which equation justifies why 9 1/3 = 3 square root of 9?
kozerog [31]

Answer: answer is A

Step-by-step explanation:

8 0
3 years ago
A person who is 6ft tall walks away from a streetlight. When the person is 15 feet away from the light, the tip of his shadow is
Citrus2011 [14]
We essentially have a ratio here:
\frac{shadow}{actual}

Since we know the ratio is going to stay constant at \frac{5}{6}, we can use this to find the height of the lamp along with the information that the total distance from the lamp to the tip of his shadow is 20:
\frac{5}{6}=\frac{20}{h}
5h=120
h=24
5 0
3 years ago
Which is the most reasonable estimate for the height of a two-story house 15 centimeters, 15 meters,or 15 kilometers?
LUCKY_DIMON [66]
15 meters should be about right. hope this helped
5 0
3 years ago
Help with this question thx
mario62 [17]

Answer:

3.5ft

Step-by-step explanation:

3 0
3 years ago
887 is what percent of 4132
hodyreva [135]

Answer:

21.46 or 21.5

Step-by-step explanation:

To find the answer to this problem you must divide 877 by 4132, which gets you 0.2146. Then you multiply this answer by 100 to find the percentage; which in this case is 21.46, or 21.5 if you are rounding up. I hope my answer helped you!

7 0
3 years ago
Other questions:
  • A graphic designer charges an hourly rate. In July, the only expense is for advertising. The function graphed models the designe
    14·2 answers
  • I really need help asap!!!!!!!!!!!!!!
    10·1 answer
  • Select the correct answer.
    6·1 answer
  • Please help i will mark brainly!
    9·1 answer
  • What is the GCF of 22 and 33
    7·1 answer
  • What is the solution to the system of equations below?
    13·1 answer
  • Witch method can be used to find the range of a set of data
    10·1 answer
  • Given square NOWR, what is the value of x and y?
    12·1 answer
  • Find f(5) for f(x)= 1/9(3)^x<br> A. 27<br> B. 3<br> C. 9<br> D. 81
    12·1 answer
  • The A.M. between two numbers exceeds their G.M. by 2 and the G.M. exceeds the H.M by 1.8. Find the numbers.​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!