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
Ulleksa [173]
3 years ago
12

Solve each system by substitution. 8). -7x-2y=-13 x-2y=11

Mathematics
1 answer:
tatyana61 [14]3 years ago
8 0
-7x-2y=-13
x-2y = 11 get x alone
x-2y+2y=11+2y
x= 2y+11 substitute into 1st equation

-7 (2y+11) -2y =-13
-14y -77 -2y = -13
-16y -77 = -13
-16y -77 + 77 = -13 + 77
-16y = 64
-16y/-16 = 64/-16
y = -4

substitute in the 2nd equation

x =2y +11
x = 2(-4) + 11
x = -3 + 11
x = 3

Check work
-7(3) -2(-4) = -13
-21 + 8 = -13
-13 = -13

3 -2(-4) = 11
3 + 8 = 11
11 = 11

You might be interested in
Write the logarithmic expression as a single logarithm with coefficient , and simplify as much as possible. Assume that all vari
Allushta [10]

Answer:

hope you can understand

4 0
2 years ago
\dfrac {15}k
Monica [59]

Answer:

5

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
What is 7 1/2 hrs before 2:12 am
Elena-2011 [213]
6:42 pm because you just subtract the elapsed time. 
8 0
3 years ago
The diagonals of a kite _____.
Vikentia [17]

Answer:

A. Meet at a right angle.

Step-by-step explanation:

We should know the properties of kite.

(1) The diagonals of a kite meet at a right angle.

(2) Kites have exactly one pair of opposite angles that are congruent.

Therefore, the answer is A. Meet at a right angle.

Thank you.

5 0
3 years ago
1. Find the GCF of 3x3y5z and 21xy3z4.
swat32

Answer:

GREATEST COMMON FACTOR IS 9XZ

4 0
3 years ago
Other questions:
  • A rectangular wall measures 1620cm by 68cm. Estimate the area of the wall.
    7·1 answer
  • 16. If a customer's check subtotal comes to $27.14,
    7·2 answers
  • The length of a person's hand compared with the
    7·1 answer
  • Identify the domain and range of the relation. Represent the relation with a
    12·1 answer
  • -9,-8.7,-8.4 find the 32nd term of each sequence
    15·1 answer
  • Eight less than the product of 9 and a number equals 2.
    10·1 answer
  • What is the value of tan(60°)?<br><br> A. 1/2<br> B. √3<br> C. √3/2<br> D. 1/√3
    14·2 answers
  • The local sandwich shop manager is slicing deli meat for lunch. He needs to slice the same amount of pepperoni as
    15·1 answer
  • Simplify;4t-2k+5k-t?<br> Help
    11·2 answers
  • If f(x)=-2x+7, what is f(1/2x+3) equal to?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!