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
kvasek [131]
3 years ago
6

Solving using elimination -7x-y=-17 7x-5y=-1

Mathematics
1 answer:
Alik [6]3 years ago
6 0

Answer:

x=2, y=3

Step-by-step explanation:

-7x-y=-17

7x-5y=-1

Add the two equations together to eliminate x

-7x-y=-17

7x-5y=-1

-------------------

  -6y = -18

Divide by -6

-6y/-6 = -18/-6

y = 3

Now we need to find x

7x -5y = -1

7x -5(3) = -1

7x -15 = -1

Add 15 to each side

7x -15+15 = -1+15

7x = 14

Divide by 7

7x/7 = 14/7

x =2

You might be interested in
The mean student loan debt for college graduates in Illinois is $30000 with a standard deviation of $9000. Suppose a random samp
Nataly [62]

Answer:

the probability that the mean student loan debt for these people is between $31000 and $33000 is 0.1331

Step-by-step explanation:

Given that:

Mean = 30000

Standard deviation = 9000

sample size = 100

The probability that the mean student loan debt for these people is between $31000 and $33000 can be computed as:

P(31000 < X < 33000) = P( X \leq 33000) - P (X \leq 31000)

P(31000 < X < 33000) = P( \dfrac{X - 30000}{\dfrac{\sigma}{\sqrt{n}}} \leq \dfrac{33000 - 30000}{\dfrac{9000}{\sqrt{100}}}    )- P( \dfrac{X - 30000}{\dfrac{\sigma}{\sqrt{n}}} \leq \dfrac{31000 - 30000}{\dfrac{9000}{\sqrt{100}}}    )

P(31000 < X < 33000) = P( Z \leq \dfrac{33000 - 30000}{\dfrac{9000}{\sqrt{100}}}    )- P(Z \leq \dfrac{31000 - 30000}{\dfrac{9000}{\sqrt{100}}}    )

P(31000 < X < 33000) = P( Z \leq \dfrac{3000}{\dfrac{9000}{10}}}) -P(Z \leq \dfrac{1000}{\dfrac{9000}{10}}})

P(31000 < X < 33000) = P( Z \leq 3.33)-P(Z \leq 1.11})

From Z tables:

P(31000 < X

P(31000 < X

Therefore; the probability that the mean student loan debt for these people is between $31000 and $33000 is 0.1331

8 0
3 years ago
What is the opposite of the opposite of negative nine?​
pogonyaev

Answer:

-9 or negative 9

Step-by-step explanation:

The opposite of negative 9 is positive 9.

The opposite of <em>that</em> is negative 9.

8 0
3 years ago
Read 2 more answers
If f(3)=8 and f'(3)=5 what do you know about f^-1​
Phoenix [80]

24 is the answer for(3)=8

15 is the answer for (3)=5

8 0
3 years ago
2.) Solve 48 = -6<br>4.) Solve 4 + 3.5 = 12.5​
3241004551 [841]
These aren't solvable.
5 0
4 years ago
Since there are 12 tenths you need to regroup. you can regroup 12 tenths as 1 whole and 2 tenths
Effectus [21]
1 whole, 1 tenth, 10 ones = 12 tenths
6 0
3 years ago
Other questions:
  • Morgan and Leigh spend a certain amount of money from their money box each month to buy plants. The table shows the relationship
    10·1 answer
  • One angle of a rhombus measures 108°, and the shorter diagonal is 9 inches long. Approximately how long is the side of the rhomb
    11·1 answer
  • The point A(-2, 3) is translated using T: (x,y) = (x + 4, y + 2).
    15·1 answer
  • Simplify the expression.
    15·1 answer
  • Which of the following terms best describes the set of all points in a plane for which the difference between the distances of a
    5·1 answer
  • -7x=x² + 12
    6·1 answer
  • Question 14 of 15<br><br><br> Evaluate (3/4)x^0
    9·2 answers
  • |-4+5x|=16 <br> Pls help<br> Pls
    14·1 answer
  • Can someone help me with this
    14·1 answer
  • Please help <br> Worth 20 points <br> Show the work
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!