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
marin [14]
2 years ago
8

Solve the equation with substitution 3x-2y=9 Y=2x-7

Mathematics
1 answer:
stich3 [128]2 years ago
3 0
3x-2y=9 \\
y=2x-7 \\ \\
\hbox{substitute 2x-7 for y in the 1st equation:} \\
3x-2(2x-7)=9 \\
3x-4x+14=9 \\
-x+14=9 \ \ \ |-14 \\
-x=-5 \ \ \ |\times (-1) \\
x=5 \\ \\
y=2x-7=2 \times 5-7=10-7=3 \\ \\
\boxed{(x,y)=(5,3)}
You might be interested in
For 23-25, use the table.
alexandr402 [8]
Jon and Gina are different we’re opposite
7 0
2 years ago
Read 2 more answers
Translate the sentence into an equation. Six more than the quotient of a number 5 and 9 equals . Use the variable y for the unkn
sashaice [31]
the answer is 6+5y=9
7 0
3 years ago
Which fraction is equivalent to negative 7 over 8 ? (1 point)
Alja [10]
The answer is -7/8\= 7/-8 Thank you!
6 0
3 years ago
Read 2 more answers
another rectangle has length and width in the ratio of 3:2. If the length is increased by eight and the width is increased by 50
Andreyy89

Answer:

Area of the new rectangle  = 148.8 cm square

Step-by-step explanation:

Let x be the dimensions of the rectangle then the

Perimeter of the Original rectangle= 2(L+B)

                                                   = 2 ( 3x+2x) = 2(5x)= 10xcm

If the length is increased by eight the new length would be 3x+ 8

and width would be 2x+x= 3x after 50 % increase

Perimeter of the new rectangle= 2(L+B)

                                                     = 2 ( 3x+8 +3x)

                                                       = 2 (6x+8)

                                                       = 12x + 16

Ratio of the new perimeter to the original perimeter is

             New perimeter :   Original perimeter

                8                      : 5

           12x+ 16                   : 10x cm

80x= 60x + 16

20x= 16

x= 16/20= 4/5

Putting the value of length and breadth in place of x

Area of the new rectangle = L*B =  3 * (4/5) +8 *3(4/5)=

                                                                 = 12+ 40/5 * 12/5

                                                                   = 62/5* 12/5

                                                                     = 744/5

                                                                   = 148.8 cm square

8 0
3 years ago
A _____ has two-fold rotational symmetry.
Neko [114]

The answer is D. line.

5 0
3 years ago
Other questions:
  • A builder buys bricks at the rate of $4.50 per brick for the first 10, $3.50 per brick for the next 10, and $2.50 for any additi
    12·1 answer
  • What like is perpendicular to the Y equals 6/4 X +4
    12·1 answer
  • Which one of the following does not find the value of f ′(5) for f(x) = 3x2 – 2x – 4?
    11·1 answer
  • What is 664.895 to the nearest tenth
    13·2 answers
  • Name the intersection of lines a and c
    13·1 answer
  • Whats the scientific notation of 0.258
    14·1 answer
  • 2 1 /4 meters by 1 7 /8
    9·1 answer
  • What is the image on segment Oj rotated 270 counterclockwise around point 0?
    10·1 answer
  • Someone help please
    10·1 answer
  • What is the value of -3/2÷-7/2?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!