Create an equivalent system of equations using the sum of the system and the first equation

Mathematics

2 answers:

ohaa [14]3 years ago

8 0

Answer:

$\large\boxed{A.\ \left\{\begin{array}{ccc}-3x+y=12\\-2x+4y=18\end{array}\right}$

Step-by-step explanation:

$\underline{+\left\{\begin{array}{ccc}-3x+y=12\\x+3y=6\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-2x+4y=18\\\\\text{therefore}\\\\\left\{\begin{array}{ccc}-3x+y=12\\-2x+4y=18\end{array}\right$

KIM [24]3 years ago

6 0

Answer:

it's A

Step-by-step explanation:

You might be interested in

Choose Yes or No to indicate whether the statement is correct.

Savatey [412]

Answer:

3rd one is no. the others are all yes

4 0

3 years ago

Read 2 more answers

At a race track you have the opportunity to buy a ticket that requires you to pick the first and second place horses in the firs

rewona [7]

Answer:

4032 different tickets are possible.

Step-by-step explanation:

Given : At a race track you have the opportunity to buy a ticket that requires you to pick the first and second place horses in the first two races. If the first race runs 9 horses and the second runs 8.

To find : How many different tickets are possible ?

Solution :

In the first race there are 9 ways to pick the winner for first and second place.

Number of ways for first place - $^9C_1=9$