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
Veseljchak [2.6K]
3 years ago
10

Solving systems of equations using any method

Mathematics
1 answer:
andreev551 [17]3 years ago
7 0

Answer:

x = 5 , y = 2

Step-by-step explanation:

Solve the following system:

{y = (7 x)/5 - 5 | (equation 1)

{y = (3 x)/5 - 1 | (equation 2)

Express the system in standard form:

{-(7 x)/5 + y = -5 | (equation 1)

{-(3 x)/5 + y = -1 | (equation 2)

Subtract 3/7 × (equation 1) from equation 2:

{-(7 x)/5 + y = -5 | (equation 1)

{0 x+(4 y)/7 = 8/7 | (equation 2)

Multiply equation 1 by 5:

{-(7 x) + 5 y = -25 | (equation 1)

{0 x+(4 y)/7 = 8/7 | (equation 2)

Multiply equation 2 by 7/4:

{-(7 x) + 5 y = -25 | (equation 1)

{0 x+y = 2 | (equation 2)

Subtract 5 × (equation 2) from equation 1:

{-(7 x)+0 y = -35 | (equation 1)

{0 x+y = 2 | (equation 2)

Divide equation 1 by -7:

{x+0 y = 5 | (equation 1)

{0 x+y = 2 | (equation 2)

Collect results:

Answer:  {x = 5 , y = 2

You might be interested in
A geometric sequence has these terms: a1 = 8, a2 = 20, az = 50, and a4 = 125.
stira [4]

Answer:

a_{n} = 8(2.5)^{n-1}

Step-by-step explanation:

The n th term of a geometric sequence is

a_{n} = a(r)^{n-1}

where a is the first term and r the common ratio

Here a = 8 and r = \frac{20}{8} = 2.5, thus

a_{n} = 8(2.5)^{n-1}

7 0
3 years ago
Help plz, show work
stepan [7]

Answer:

  • 63°
  • 50° , 40°

Step-by-step explanation:

1.

3 :7 \\Acute \: angle = 90\°\\7+3 = 10\\\frac{7}{10} \times 90\\\\= \frac{630}{10}\\ = 63 \°\\

2.

Let \:the\: other\:acute \:angle\: be \:x\\According\:to \:the \:question ; \\ \:\\(2x-30)+x =90\\2x - 30 +x =90\\2x +x = 90+30\\3x = 120\\\frac{3x}{3} =\frac{120}{3} \\x = 40 \\\\(2x -30)\\2(40) -30\\80 - 30 = 50\\\\\\Angle \:1 = 50\°\\Angle \: 2 = 40\°\\

8 0
3 years ago
Read 2 more answers
Jennifer has 5/6 of a candy. At and would like to split it equally between herself and her 4 friends. What fraction of the candy
Maru [420]

Answer:

1/6

Step-by-step explanation:

Candy = 5/6

5 people = 5/6

1 person

= 5/6 ÷ 5

= 5/6 x 1/5

= 1/6

8 0
3 years ago
Please help!!! The picture is below not sure how to right it
Dominik [7]

Answer:

1/25

Step-by-step explanation:

9765625/244140625 = 1/25

8 0
3 years ago
Help me i need help i want help
postnew [5]
It is the second answer.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Can someone please answer these two Algebra math questions for me thanks!
    8·1 answer
  • Is the relationship between 7,742 and 7,785 different in anyway?
    12·1 answer
  • One quick algebra Q. (look at attached picture)
    11·1 answer
  • How many edges does a 3D pentagon have
    14·1 answer
  • The Bureau of Alcohol, Tobacco, and Firearms (BATF) has been concerned about lead levels in California wines. In a previous test
    8·1 answer
  • The interior angles of triangle ABC measure 34°, 63°, and x°. The Interior angles of triangle DEF measure y°, 63°, and 83°.
    8·1 answer
  • Dominique paid $15.50 to join an online music service.If she purchases 10 songs each month at a cost of $0.99 per song,what will
    7·1 answer
  • What number is in between 9 and 9.25?
    14·2 answers
  • What are the solutions of this quadratic equation?
    5·1 answer
  • Rebecca is calculating her expected expenses for her week long trip to Thailand. Her plane ticket costs 22,885 baht, her lodging
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!