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
In angle ABC the measure of Angle B is 13 more than the measure of Angle A and the measure of angle C is 9 less than twice the m
alisha [4.7K]

Answer:

its b

Step-by-step explanation:

its

3 0
2 years ago
Can you walk me through this problem i dont understand it AREA OF POLYGONS
Mamont248 [21]
The area of a paralellogram is bh

each dimention is multiplied by n
b turns to bn
h turns to hn

bh turns to (bn)(hn) or bnhn or bhn²

expression is bhnn or bhn² or bhn^2 (depends if the program will let you enter the exponent)
6 0
3 years ago
HELPPPPP! <br> Seven more than the product of 7 and Craig's score
torisob [31]

Answer:

14

Step-by-step explanation:

7+7

6 0
3 years ago
Read 2 more answers
GEOMOTRY QUESTION PLEASE HELP
Ymorist [56]

last one is the right answer

4 0
3 years ago
Geometry help please ;(
Crazy boy [7]
The answer would be a reason being sinangle= opposite/hypotenuse
if u shift ur phone and observe it is 12/13
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which correctly describes a cross section of the cube below? Check all that apply.
    14·1 answer
  • Select a rule for the following pattern. 44; 440; 4,400; 44,000 . . .
    13·2 answers
  • PLEASE HELP!!!
    6·1 answer
  • What is sin(45°). Show work.
    15·1 answer
  • Draw and label the final image of △ABC after the given sequence of transformations. Reflect △ABC over the y−axis and then transl
    10·1 answer
  • Chris types at an average speed of 45 words per minute. He has already typed 1,500 words of his final paper. The paper has to be
    10·1 answer
  • SMART PEOPLE PLEASE HELP ME !!!!!!!!!!!!!!!!
    15·2 answers
  • Linear or nonlinear?​
    11·1 answer
  • Dinkle Company purchased equipment for $50,000. The equipment has an estimated residual value of $5,000 and an expected useful l
    8·1 answer
  • My room is 7½ ft by 8 ¼ ft. If I want to put a border around it l mid help​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!