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
kotegsom [21]
3 years ago
8

Substitution method need help for home work

Mathematics
1 answer:
Marizza181 [45]3 years ago
6 0
-3y = x...so we sub in -3y for x in the other equation

-x + 7y = 70
-(-3y) + 7y = 70
3y + 7y = 70
10y = 70
y = 70/10
y = 7

so we sub in 7 for y in either of the original equations to find x
-3y = x
-3(7) = x
-21 = x

so ur solution is (-21,7)
You might be interested in
Xa farmer wants to fence in a rectangular plot of land adjacent to the north wall of his barn. no fencing is needed along the ba
Kay [80]
Width=34.2
Length=65.2
6 0
3 years ago
Find the perimeter ​
Inga [223]

Answer:

56

Step-by-step explanation:

Perimeter= 4S

Perimeter= 4(5)

Perimeter= 20

Perimeter 2= 2(L+W)

Perimeter 2= 2(11+7)

Perimeter 2= 22+14

Perimeter 2= 36

Total Perimeter= P1+P2

Total Perimeter= 20+36

Total Perimeter= 56

6 0
3 years ago
A triangle has side lengths of (x-6), (x+2) and (x-9). Find the perimeter of the triangle
Setler [38]

Answer:

3x - 13

Step-by-step explanation:

The perimeter is just the distance around the triangle. We have all three sides, so we can just add them together to get the total distance.

(x-6) + (x+2) + (x-9)

Group:

x + x + x - 6 + 2 - 9

3x - 13

8 0
3 years ago
Find the value of a and b in (a,2)=(2,b)​
Ksenya-84 [330]

Answer:

a=2 and b=2...............

8 0
3 years ago
Your hair is growing at 1 inch per month. You got your hair cut to 4 inches in length. Write and equation that gives the length
Korvikt [17]

Answer:

Your hair grows 2 to 4 inches in 4 months, 4 to 6 inches in 9 months, and 6 to 8 inches in a year. Though this is how the usual growth cycle works, it also depends on seasonal changes, hair and scalp health, medications, hormonal changes, and diet among other factors.

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • What is the solution to the equation 6x = 39?
    5·1 answer
  • Whats 455 x 5<br> ?????????????????????
    15·2 answers
  • The prism below is made of cubes which measure 1/3 of an inch on one side. What is the volume?
    9·2 answers
  • Use the graph to identify whether there is linear
    8·2 answers
  • There are 384 nails in a 16-ounce jar. How many nails are there per ounce in the jar?
    10·2 answers
  • Terry has completed 15 homework problems, and Susan has completed 9. Terry is completing 10 problems per hour, and Susan is comp
    10·1 answer
  • 40 divided by a number m
    13·1 answer
  • Alternate exterior angles, corresponding, interior <br>​
    12·1 answer
  • I need Help please please
    12·1 answer
  • HELP ME 2 PICTURES BTW 50 POINTS
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!