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
HACTEHA [7]
3 years ago
5

How do you solve -3x+y=7 5x+2y=3 by substitution method??

Mathematics
2 answers:
JulsSmile [24]3 years ago
8 0
Yes you would have to solve this problem by substitution method
lakkis [162]3 years ago
8 0

Answer:

(-1,4)

Step-by-step explanation:

-3x + y = 7......y = 3x + 7

so sub in 3x + 7 in for y back into the other equation

5x + 2y = 3

5x + 2(3x + 7) = 3 ...distribute thru the parenthesis

5x + 6x + 14 = 3....subtract 14 from both sides

5x + 6x = 3 - 14...combine like terms

11x = - 11...divide both sides by 11

x = -11/11

x = -1

now that we know x = -1, we can sub that back into either of the original equations to find y

y = 3x + 7

y = 3(-1) + 7

y = -3 + 7

y = 4

so we have (-1,4) as a solution....but lets check it first

-3x + y = 7

-3(-1) + 4 = 7

3 + 4 = 7

7 = 7 (correct)...it checks out

so ur solution is : x = -1 and y = 4 or (-1,4)

You might be interested in
Simplify (4/5)^-2. Show your work!<br> PLEASE HELP ASAP! 40 POINTS!
Olenka [21]

Answer: (16/25)

Step-by-step explanation: That's -(4/5) x -(4/5) = (16/25). It's that answer because a negative times a negative equals a positive. The exponent in the problem is telling you to multiply -4/5 times itself 2 times.

5 0
3 years ago
NEED URGENT HELP I WILL DO ANYTHING
seropon [69]
1. Here are the four steps of the statistical process in correct order:
1) Plan - <span>Form a question that can be answered by data.
2) Collect data - D</span><span>esign and implement a plan that collects data.
3) Process - </span><span>Analyze the data using graphical and numerical methods.
4) Present and discuss - </span><span>Interpret and compare the data.
So your answer is the last option. 

2. I am definitely sure that </span><span>Edgar wrote a statistical, because every neighbor can give a different answer. A statistical question is the question which you don't expect to get only one answer. Instead of that you will get a variety of different answers.

3. According to what I've mentioned before, the only statement which shows a characteristic of a statistical question is: </span><span>There can be variability in the answers to the question.

4. I am completely sure that this one is statistical question: </span>How many hours do you spend each week training for a sports league? Because it could be answered with variability.

5. The only statistical question in his survey is: <span>How many hours do you spend at the food court each month?. Because it gives him more different answers for his survey.</span>
5 0
3 years ago
Read 2 more answers
Jill has a rectangular garden that measures 12 by 14. She wants to increase the area to 225 by increasing the width and length b
antoniya [11.8K]

Answer:

are you sure it is 225 because when i add 2 to both sides it is 14 by 16 which when you multiply it becomes 224

Step-by-step explanation:

8 0
3 years ago
Why can you use the constant of proportionality with any representation?
pantera1 [17]

Answer:

  1. The number k is called the constant of proportionality. One important way of thinking about this constant k is that it tells us how much y increases by if we increase x by exactly 1. to express that y is directly proportional to x.
3 0
3 years ago
A photograph has a length that is 4 inches longer than its width, x. Its area is given by the expression x(x + 4). If the area o
xxTIMURxx [149]

Answer:

The length is 12 inches and the width is 8 inches.

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • letisha wants to read 33 pages a night.a t the rate, how long will it take her to read a book with 300 pages
    14·1 answer
  • I tried graphing this and I messed up can someone help me graph it?
    8·1 answer
  • 20 multiplication facts in one minute. How long to take him to complete 35 multiplication facts
    11·1 answer
  • Pi times seventeen equals forty-seven
    13·1 answer
  • Use the percent formula, A=PB: A is P percent of B, to solve the problem.
    9·1 answer
  • The number of souvenir coeffe mugs (in hundreds) that Ace Novelty can produce monthly is given by the production function:
    8·1 answer
  • The berry-picking boxes at Bingo Berry Farm have square bottoms that are 8 centimeters on each side. Todd fills his box with ras
    8·1 answer
  • HELP ME PLEASE CANT UNDERSTAND!!!!
    9·1 answer
  • Translate and simplify if needed :Three less than a number increased by twice the same number
    9·1 answer
  • Find the slope of the line through the given points 4,2 and 6,4
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!