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
KIM [24]
4 years ago
11

6x - 9= y y= -3x using the system of linear equation by substitution Help please! This is due really soon

Mathematics
1 answer:
solniwko [45]4 years ago
6 0

Answer:

x = 1 and Y = -3

Step-by-step explanation:

Rewrite equations:

y=−3x;6x−9=y

Step: Solvey=−3xfor y:

y=−3x

Step: Substitute−3xforyin6x−9=y:

6x−9=y

6x−9=−3x

6x−9+3x=−3x+3x(Add 3x to both sides)

9x−9=0

9x−9+9=0+9(Add 9 to both sides)

9x=9

9x

9

=

9

9

(Divide both sides by 9)

x=1

Step: Substitute1forxiny=−3x:

y=−3x

y=(−3)(1)

y=−3(Simplify both sides of the equation)

Answer:

x=1 and y=−3

You might be interested in
A rope is divided into three pieces. One piece is 3 inches longer than the shortest piece and 5 inches shorter than the longest
Ilia_Sergeevich [38]
<span>One piece is twenty seven inches long. The others are thirty inches, and thirty five inches. Let's say "A" is the shortest piece, and the base for the equation. The next piece is three inches longer, so we have A+3. The longest piece is five inches longer than the second, so we get A+3+5. To solve for "A" we have to simplify. A+(A+3)+(A+3+5)=3A+11. The total length is 92, so 3A+11=92. Subtract 11 from both sides to get "A" by itself: 3A+11+(-11)=92+(-11) to 3A=81. To solve divide both sides by 3: 3AĂ·3=81Ă·3 to A=27. (27)+3=30. (27)+3+5=35. To check, add the sums. 27+30+35=92 : that is a true statement.</span>
3 0
3 years ago
Read 2 more answers
6x + 15xy<br> Looking For Factor
padilas [110]

Answer:

x(6 + 15y)

Step-by-step explanation:

In this instance, you can divide by a factor of x.

6x/x = 6

15xy/x = 15y

Therefore, we are left with 6 + 15y.

6 0
3 years ago
A 5-k race is 5 kilometers long. How long is it in millimeters?
Ahat [919]

Answer: 1 kilometer = 1,000,000 millimeters so multiply that times 5 and you have your answer 5,000,000 millimeters.

4 0
3 years ago
Simplify the ratio: 12.5 kg : 100g and convert it into fraction, decimal and percentage. PLS SHOW WORKING.
asambeis [7]

Answer:

12.5/100=0.125. i think it’s the answer

sorry if it not but DO NOT FORGET STAY SAFE AT HOME

6 0
3 years ago
Volume of the 3d shapes to 1 decimal place (urgent )
DerKrebs [107]

Step-by-step explanation:

the volume of pyramid =

⅓× base area × height =

⅓× (½×7×5)×6 =

1/6 × 210 = 35 cm³

4 0
3 years ago
Read 2 more answers
Other questions:
  • A box is 90 cm long. Which of these is closest to the length of this box in feet?
    15·2 answers
  • Simplify the expression.
    9·1 answer
  • Solve for a: <br> 3/5a = 1/4
    13·2 answers
  • What is the area of a triangle with a base of 2.4 cm and a height of 0.8 cm?
    11·1 answer
  • Solution for 3/4x - 12 = -18?
    11·2 answers
  • Which of the points shown below are on the line given by the equation y = 2x?
    5·1 answer
  • Which expression represents the area of this shape
    6·2 answers
  • 20 x 200<br> need help rn
    13·2 answers
  • Solve the inequality and enter your solution as an inequality.<br><br> X-4&lt;6​
    8·1 answer
  • What is the value of the rational expression below when x is equal to 4?<br> X+ 20/X+4
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!