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
Dafna1 [17]
4 years ago
12

A student took a system of equations, multiplied the first equation by and the second equation by , then added the results toget

her. Based on this, she concluded that there were no solutions. Which system of equations could she have started with?
A. -2x+4y=4

-3x+6y=6

B.3x+y=12

-3x+6y=6

C.3x+6y=9

-2x-4y=4

D. 2x-4y=6

-3x+6y=9
Mathematics
1 answer:
Ierofanga [76]4 years ago
3 0

Answer:

option A

-2x + 4y = 4

-3x + 6y = 6

Step-by-step explanation:

In option A, if the student multiply the first equation by 3 and the second equation by -2, then the equations become

-6x+12y = 12 and

6x-12y =-12

If she adds both equations, she will get 0 = 0

This means that the system has infinite number of solutions.

Hence, the student could have started with equations -2x + 4y = 4 and -3x + 6y = 6.

You might be interested in
Maria studied the traffic trends in India. She found that the number of cars on the roads increases by 10% each year. If there w
laiz [17]
You would do

(1.1)(80,000,000)=88,000,000

That is the total cars for year two. To find the increase you would do

(1.1)(88,000,000)=96,800,000

Then you would subtract year 2 from year three

96,800,000-88,000,00=8,800,000

That gives you ur answer.
7 0
3 years ago
Read 2 more answers
The two legs (labeled x) of the right triangle below have equal length. If the hypotenuse has length 5√2 , solve for x.
leonid [27]

Answer:

x=5

Step-by-step explanation:

Other than using the plain special aspect of a 45-45-90 triangle where the legs are x, x, and x√2, you can solve for this.

Since the two legs have equal length, they are both x. Using the pythagorean theorem:

(x^2)+(x^2)=50 (Because 5 squared is 25 and √2 squared is 2, multiplying them gives you 50).

You can add (x^2) and (x^2) because they are the same terms (x squared).

Simplifying like so gives you:

2x^2=50

Dividing by two on both sides:

x^2=25

Taking the square root of both sides:

x=5

6 0
4 years ago
Put the following steps for executing a stock trade in order. What is the order? 2,4,1,3?
Temka [501]

Answer:

The answer would be 1,2,4,3

Step-by-step explanation:

I just took a quiz with this same question :)

4 0
3 years ago
Which irrational number can be multiplied by –StartRoot 41 EndRoot to get a product that equals 1?
Marta_Voda [28]

Answer:

StartRoot StartFraction 1 Over 41 EndFraction EndRoot

Negative StartRoot 41 EndRoot

Negative StartRoot StartFraction 1 Over 41 EndFraction EndRoot

StartRoot 41 EndRoot

5 0
3 years ago
What is 8.24+3.4 i need the aanswer please
kirill115 [55]

Answer:

11.64

Step-by-step explanation:

8.24+3.4=11.64

6 0
3 years ago
Read 2 more answers
Other questions:
  • If 23 is subtracted from 8 times the number, the result is the square of 2 less than the number.
    9·1 answer
  • Find the sum of the geometric series:
    7·1 answer
  • The sum of three and seven times a number is -74. What is the number?
    9·2 answers
  • - Dr. Watson combines 400 mL of detergent,
    8·1 answer
  • Ingrid is making a quilt using squares that measure 2 in on each side. What is the length of a diagonal of one of the quilt squa
    8·1 answer
  • Which system is equivalent to StartLayout Enlarged left-brace 1st Row 5 x squared + 6 y squared = 50 2nd row 7 x squared + 2 y s
    6·2 answers
  • Lol this is my last question for the night!!!
    8·2 answers
  • Can somebody help me with these 3. Will mark brainliest.
    14·1 answer
  • The annual rainfall in a town has a mean of 51.84 inches and a standard deviation of 8.05 inches. Last year there was rainfall o
    9·1 answer
  • Evaluate. (-5)² A. -52 B. -25 C. -10 D. 10 E. 25​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!