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
Lilit [14]
3 years ago
13

How do i show the substitution method to solve x=5y-7 and 3y+2y=12

Mathematics
1 answer:
Katena32 [7]3 years ago
5 0

Answer:x=-20  y=4

Step-by-step explanation:

You might be interested in
Solve the simultaneous equation <br> 2x - 5y = 9<br> 3x + 4y = 2
lianna [129]

Answer:

x = 2, y = -1.

Step-by-step explanation:

2x - 5y = 9

3x + 4y = 2

Multiply first equation by -3 and the second by 2:

-6x + 15y = -27

6x + 8y = 4            Adding the 2 equations:

23y = -23

y = -1.

Now substitute this value for y in the first equation:

2x - 5(-1) = 9

2x = 9 +5(-1)

2x = 9 - 5

2x = 4

x = 2.

8 0
3 years ago
What is the next term in the multiplication pattern that begins 14, 70, 350? A. 630
wolverine [178]
Answer is <span>C. 1750 

multiply by 5

14 x 5 = 70
70 x 5 = 350
350 x 5 = 1750</span>
5 0
3 years ago
Read 2 more answers
Find the perimeter of a rectangle with length 7x - 2 and width 5x^2 + 1.
stealth61 [152]

Answer:

10x^2 + 14x - 2

Step-by-step explanation:

So for the perimeter, you have to solve 2(7x-2) + 2(5x^2+1)

So distribute the 2s on both s we get 14x - 4 + 10x^2 + 2

This in standard form is 10x^2 + 14x - 2

4 0
3 years ago
Write the slope-intercept form of the equation of each line given the slope and y-intercept.
saul85 [17]

Answer:

4b. −6x + y = −4

4a. 7x + 4y = −12

3b. y = ½x + 3

3a. y = −6x + 5

2b. y + 2 = −⅔(x + 3)

2a. y - 3 = ⅘(x - 5)

1b. y = -x + 5

1a. y = 5x - 3

Step-by-step explanation:

4.

Plug the coordinates into the Slope-Intercept Formula first, then convert to Standard Form [Ax + By = C]:

b.

2 = 6[1] + b

6

−4 = b

y = 6x - 4

-6x - 6x

_________

−6x + y = −4 >> Standard Equation

a.

4 = −7⁄4[-4] + b

7

−3 = b

y = −7⁄4x - 3

+7⁄4x +7⁄4x

____________

7⁄4x + y = −3 [We do not want fractions in our Standard Equation, so multiply by the denominator to get rid of it.]

4[7⁄4x + y = −3]

7x + 4y = −12 >> Standard Equation

__________________________________________________________

3.

Plug both coordinates into the Slope-Intercept Formula:

b.

5 = ½[4] + b

2

3 = b

y = ½x + 3 >> EXACT SAME EQUATION

a.

−1 = −6[1] + b

−6

5 = b

y = −6x + 5

* Parallel lines have SIMILAR <em>RATE OF CHANGES</em> [<em>SLOPES</em>].

__________________________________________________________

2.

b. y + 2 = −⅔(x + 3)

a. y - 3 = ⅘(x - 5)

According to the <em>Point-Slope Formula</em>, <em>y - y₁ = m(x - x₁)</em>, all the negative symbols give the OPPOSITE TERMS OF WHAT THEY REALLY ARE, so be EXTREMELY CAREFUL inserting the coordinates into the formula with their CORRECT SIGNS.

__________________________________________________________

1.

b. y = -x + 5

a. y = 5x - 3

Just write out the Slope-Intercept Formula as it is given to you.

I am joyous to assist you anytime.

3 0
3 years ago
EASY BRAINLIEST PLEASE HELP!!
iogann1982 [59]

Answer:D..the diagonals bisect each other. Since bisectors divide the diagonals equally in two parts.

6 0
3 years ago
Read 2 more answers
Other questions:
  • The vertex of a parabola is (-1.5, -12.5), and its y-intercept is (0, -8).
    10·2 answers
  • Kennedy can type 150 words in 2 minutes. How many words per minute can Kennedy type?
    6·2 answers
  • Can someone please help with this it’s worth 19 points?
    11·1 answer
  • The ratio of boys to girls in a class is 3:4. There are 35 students in the class.
    10·2 answers
  • Least to greatest 6 3/10,1 3/10, 1 3/11, -7 6/14, 5 3/10
    12·1 answer
  • SOMEONE ANWSER QUICK !
    9·1 answer
  • The measures of the angles of a triangle are shown in the figure below. Solve for x. ​
    10·2 answers
  • Randy wants to save $21 to buy a basketball he saved $7 each week which array represents the number of weeks randy needs to save
    15·1 answer
  • Help plzz i'll give brainliest istg but don't use for points cuz its annoying
    15·2 answers
  • I need helppp<br> It’s for math and I’m clueless
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!