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
Orlov [11]
3 years ago
10

2x - 7y = 2 and 3x + y = -20 addition/elimination

Mathematics
1 answer:
Mkey [24]3 years ago
6 0

Answer:

x = -6, y = -2

Step-by-step explanation:

2x-7y = 2

3x + y = -20

We need to cancel out either x or y to solve the equation. I'll cancel out x first

3(2x-7y = 2)

-2(3x+y=-20)

___________

6x-21y = 6

-6x -2y = 40

____________

-23y = 46

y = -2

Plug the value for y in one of the 2 equations to solve for x

2x -7(-2) = 2

2x+14=2

2x = -12

x=-6

You might be interested in
Find the range of the data. .
AlekseyPX

Answer: 4

Step-by-step explanation: Range is the difference between the highest and lowest number, so since 5 is the highest and 1 is the lowest you subtract 1 from 5 to get your answer: 4.

7 0
1 year ago
Read 2 more answers
Given the following function, find f(-2), f(0), and f(4).
borishaifa [10]

Answer:

f(-2) = 0

f(0) = -4

f(4) = 12

Step-by-step explanation:

Given the function f(x) = x^2 - 4, we must plug in the values substituting x for each of the answers.

f(-2) = (-2)^2 - 4

-2 times itself is a positive 4, therefore:

f(-2) = 4 - 4

f(-2) = 0

We do the same for each answer.

f(0) = (0)^2 - 4

f(0) = -4

f(4) = (4)^2 - 4

f(4) = 16 - 4

f(4) = 12

6 0
3 years ago
A compter costs 1,000 and decreases to 725 how much did it decreas??
notka56 [123]

Answer:

275

Step-by-step explanation:

1000-725=275

4 0
2 years ago
Five times three over seven
olya-2409 [2.1K]

Answer:

15/7 or 2 1/7

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The ratio of tulips to violets is 5:6 and the total number of flowers is 99 if 10 tulips are added how many violets must be adde
vivado [14]

Answer:

  12

Step-by-step explanation:

The given ratio is ...

  tulips : violets = 5 : 6 = 10 : 12 . . . . . . . .multiply by 2

This tells us that maintaining the ratio will require 12 violets to be added for an addition of 10 tulips.

8 0
2 years ago
Other questions:
  • What is sin 67 degrees?
    14·2 answers
  • The area of a bulletin board is 55 ft2. The length is nine feet less than four times the width. Find the length and the width, i
    14·1 answer
  • At a pizzeria, a medium pizza which has diameter of 12 inches sells for $6.00 and a large pizza which has a diameter of 16 inche
    8·1 answer
  • Please help!!!
    13·1 answer
  • What is the distance between -34 and -11 on a number line?
    15·2 answers
  • Plz put the work clearly plzz I really need these
    8·1 answer
  • Helpppppppppppppppppppppppppppppppp[ppppppppp
    15·1 answer
  • In the given figure AB||CD, then find the measurements of the angles 1 and 2.​
    10·2 answers
  • How do i figure this out?
    8·1 answer
  • How does Bolsa describe Billy Joe? smart funny crazy
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!