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
deff fn [24]
3 years ago
15

Solve by using substitution-7x-2y=-13   and   x-2y=11

Mathematics
1 answer:
netineya [11]3 years ago
7 0
\left \{ {{-7x-2y=-13} \atop {x-2y=11}} \right. \\\\ \left \{ {{-7x-2y=-13} \atop {x=11+2y}} \right.\\\\
Substitute\ second\ equation\ into\ the\ first\ one:\\\\
-7(11+2y)-2y=-13\\
-77-14y-2y=-13\\
-77-16y=-13\ \ \ |Add\ 77\\
-16y= 64\ \ \ |Divide\ by\ -16\\
y=-4\\\\x=11+2y=11+2*(-4)=11-8=3\\\\ \left \{ {{y=-4} \atop {x=3}} \right.
You might be interested in
Which property does this example show? 2.61 + 92.7 = 92.7 + 2.61
azamat
The answer would be commutative.

Hope this helps !

Photon
6 0
3 years ago
Read 2 more answers
The graph of a function is shown:
Sphinxa [80]

Answer:

B.

Step-by-step explanation:

Use (X, Y)

X being the horizontal line

Y being the vertical line

6 0
2 years ago
Two equations are given below:
Sindrei [870]
\left \{ {{a - 3b = 16} \atop {a = b - 2}} \right.  \\  \\  \left \{ {{a = 16 + 3b} \atop { 16 + 3b = b - 2}} \right.  \\  \\  \left \{ {{a = 16 + 3b} \atop {3b - b = - 2 - 16}} \right.  \\  \\  \left \{ {{a =16 + 3b} \atop {2b  = -18}} \right.  \\  \\  \left \{ {{a=16 + 3b} \atop {b=-9}} \right.  \\  \\  \left \{ {{a=16 + 3b = 16 + 3*(-9) = 16 - 27 = -11} \atop {b=-9}} \right.

Answer a = -11, b = -9
8 0
3 years ago
Find the total surface area of the cube box below
zaharov [31]
The surface area of the cube is 24 feet.
5 0
3 years ago
Read 2 more answers
Y = –8x + 8<br> y = –8x + 8
fiasKO [112]

Answer:

x=0

y=8

Step-by-step explanation:

This is a simultaneous equation

So let's solve

y=-8x+8..(1)

y=-8x+8...(2)

Add (1) and (2)

2y=16

Make y the subject of formula by dividing both sides by 2

y=8

Substitute the value for y into (2)

8=-8x+8

Collect like terms

8-8=-8x

0=-8x

Divide both sides by-8

x=0

Therefore x is 0 and y is 8

5 0
3 years ago
Other questions:
  • I need an urgent help​
    11·1 answer
  • What does 3/9+5/9 equal?
    11·2 answers
  • What number does x stand for in this equation?<br> -7X + 6= 27
    12·1 answer
  • The temperature at the beginning for the day is 32°Friday and drops to -6°Friday by midnight. How many degrees did the temperatu
    8·1 answer
  • The population at Bishop High School is 2000 students in 2011. Every year the population decreases by 50 students
    9·1 answer
  • What is the circumference of the circle use 22 over 7 for pi​
    10·2 answers
  • Evaluate 8p +3q-188p+3q−188, p, plus, 3, q, minus, 18 when p=\dfrac12p= 2 1 ​ p, equals, start fraction, 1, divided by, 2, end f
    13·1 answer
  • . Five balls are placed at random in five buckets. What is the probability that each bucket has a ball
    13·1 answer
  • Natalia drove to her grandmother’s house for Thanksgiving. It took her 5 hours, for a total of 225 miles. What is her average sp
    11·1 answer
  • 3x-8y=24 <br> y=x-8<br> Please show <br> work
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!