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
Anettt [7]
3 years ago
8

In order to solve the following system of equations by subtraction, which of

Mathematics
1 answer:
uysha [10]3 years ago
7 0

Answer: I think it's C.Multiply the top equation by 3 and the bottom equation by 4

Step-by-step explanation:

Multiplying the top equation by 3 you get:

3(4x – 2y) = 3∗7

12x - 6y = 21          (eq.1)

Multiplying the bottom equation by 4 you get:

4(3x – 3y) = 4∗15

12x - 12y = 60       (eq.2)

Now, if you subtact eq.2 from eq.1 you get:

(12x - 6y = 21 )

-

(12x - 12y = 60)

___________________

0x + [- 6y -(-12y)] = 21 - 60

Carrying out the calculation you get:

6y = -39

y = -39/6

y = -13/2

You might be interested in
Can someone please help me on 20 and 21
Feliz [49]
For number 20 x = 4
3 0
3 years ago
roger has a nail that is 12 centimeters long. he measures and records the length of the nail as 15 centimeters. what is the % er
Marianna [84]
15-12=3. 3/12=1/4=25% error
4 0
3 years ago
Will you find the volume for 30 points?
morpeh [17]

Answer:

56

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Two men walk at rates of 6 miles per hour and 10 miles per hour, respectively. Simultaneously, they started from the same place
alina1380 [7]

The time taken by the two men will be equal to 26 hours

<h3>What is speed?</h3>

The speed is defined as the ratio of the time distance traveled by the body to the time taken by the body to cover the distance.

here two men are walking at different speeds like

v₁=6 miles per hour

v₂=10 miles per hour

The time taken by them to separated by the distance of 100 miles each so that both of them separated by the distance of 200 miles.

t₁= {100}/{6}=16.66 hours

t₂= {100}/{10}=10 hours

total time taken will be

t₁+t₂=16.66+10=26.66 hours

To know more about Speed follow

brainly.com/question/6504879

#SPJ1

5 0
2 years ago
How to figure it out
ElenaW [278]
Im not 100% sure but 
A: 10
B: 5     
C: 15
D: 30 
for:
A: 30 x 1/3 
B: 15 x 1/3
C: 5/ 1/3
D: 10/ 1/3 
5 0
3 years ago
Read 2 more answers
Other questions:
  • Math plz help!!!! will mark brainliest!! 20 points!
    10·1 answer
  • Write an absolute value expression to represent the distance between -2 and 4 on an number line. Then evaluate the expression.
    7·2 answers
  • If 2^21 = x + 2^20, what is the value of x ?
    12·2 answers
  • 12/24 reduced fraction
    9·2 answers
  • Pablo's retirement party will cost $8 if he invites 4 guests. If there are 6 guests, how
    9·1 answer
  • Use the triangle at the right. find the length of the missing side
    5·1 answer
  • Rosa is at most 29 years old
    7·2 answers
  • Marcus observed that 8 of the 20 games that he had bowled last week were over 180. What percent of his games were over 180?
    10·1 answer
  • Does 2x^2-8x have a GCF?
    6·1 answer
  • Will mark brainliest if correct
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!