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
geniusboy [140]
3 years ago
10

I need help with these two equations

Mathematics
1 answer:
Ivan3 years ago
7 0

for these you need to rearrange the equations and do substitutions.

 #3 = if x+y=5 then you know x = 5-y

 now substitute that equation for x in the 2nd one so x + 2y = 8 becomes

5-y + 2y = 8 2y - y becomes 1y which becomes y then subtract 5 from each side to get y =3

now replace y with 3 in the first equation x = 5-3 so x = 2 

 so (2,3) is the answer


 same type of work for #4

2x-y=6 ,S0 y = 2X+6

 so now you have 4x+2(2x+6)=-4

that becomes 4x +4x+12 = -4

8x+8 = 1, x =1

y = 2(1)-6 = -4

 so answer is (1,-4)

You might be interested in
6/25 equals D Over 30 what does D equals
Rufina [12.5K]
Your equation is 6/25 = d/30. to solve this equation we have to get d by itself! to do this, you have to multiply each side by 30 since d is being divided by thirty. d/30 x 30 = d, 6/25 x 30 =  7.2, or 7 2/10

therefore, d = 7.2
hope this helps!
4 0
3 years ago
Jenna is drawing a sketch of her room. The room is 15 feet long by 12 feet wide. The
SOVA2 [1]

Answer:

4 inches

Step-by-step explanation:

Actual dimensions:

Length = 15 feet

Width = 12 feet

Scale dimensions:

Length = 5 inches

Width = x inches

Write a proportion:

\dfrac{\text{Actual length}}{\text{Scale length}}=\dfrac{\text{Actual width}}{\text{Scale width}}\\ \\ \\\dfrac{15\ feet}{5\ inches}=\dfrac{12\ feet}{x\ inches}\\ \\x=\dfrac{5\ inches\times 12\ feet}{15\ feet}=4\ inches

3 0
3 years ago
Which sequences are geometric? Check all that apply.
DerKrebs [107]
The first, second one because they synchronization are proved to equally cause them to be similar
5 0
2 years ago
Reply with quote<br> {(-1,3),(0,5),(1,7),(2,9)} , identify the domain and range
Contact [7]

The domain is -1,0,1,2. The range is 3,5,7,9.

4 0
3 years ago
What is the simplified form of 357-5672
spayn [35]

Answer:

17/2

Step-by-step explanation:

hope this helps

7 0
3 years ago
Read 2 more answers
Other questions:
  • PLZ HELP QUESTION 3 20 POINTS!!!!
    6·1 answer
  • The school dance committee wants to know whether the students in the entire school prefer ballet or jazz. The dance committee dr
    8·2 answers
  • The graph of the function f(x)=3/x+5 is shown below.
    13·2 answers
  • {29, 29, 29, 28, 28, 27}
    11·2 answers
  • A pyramid with a rectangular base has how many more edges than vertices? List how many edges and vertices there are.
    5·1 answer
  • I need help on this onee plizzzz
    11·2 answers
  • Ms. Shafner would like to tip her hairdresser 20%. If her haircut cost $38.00, how much should she give her as a tip? *
    7·1 answer
  • Pleaseeee helpppp<br> Please
    7·1 answer
  • Help i will mark brainly
    9·2 answers
  • Hi! Could you help me?? I’m stuck on this one
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!